Mailbase Blog
Practical guides on email — cold outreach, newsletters, deliverability, design, tools, and self-hosted workflows. Filter by topic or search below.
The Mailbase blog is a working library for people who find and write to their next customers themselves. The newest guides, written in French, cover the prospecting work the product does: finding every matching company in the French register (SIRENE) and translating a trade into NAF codes, reading a site’s mentions légales for the operator and a real contact, verifying an email before anyone writes, what the CNIL actually allows for B2B outreach, and how to write to artisans and small businesses so they reply. Around them sits the older library on what keeps mail out of spam: SPF, DKIM, and DMARC; domain warmup; suppression and bounce handling; MJML and responsive design; and the self-hosted useSend stacks teams run on Docker, Coolify, or Railway. Every guide is written to be specific and honest — concrete steps and tradeoffs, not filler.
A few clear threads run through the library: prospecting from the company register and the cold email that earns a reply, newsletter growth and monetization, deliverability and authentication, email design with MJML, and the self-hosted email stacks builders run themselves. Use the topic filters and search above to jump straight to what you need. New guides ship regularly, and each one links to the related product workflow or docs page so you can move from reading to doing without hunting around.
159 posts
Agent IA prospection : ce qu’il fait vraiment, étape par étape
Un agent IA prospection n’est pas un générateur de texte branché sur un fichier. Chaque étape, du registre à la lecture des réponses, ce qui reste humain, ce qu’il faut surveiller.
Read pageCode NAF prospection : traduire un métier en code d’activité
Le code NAF prospection est le filtre le plus puissant du registre SIRENE, et le plus mal utilisé. Traduire un métier en codes, éviter les holdings et les activités mal déclarées.
Read pageCold email RGPD : les règles B2B de la CNIL en France
Le cold email RGPD en B2B n’est pas interdit en France : la CNIL l’encadre. Adresse liée à la fonction, information, opposition simple, conservation limitée, et les interdits.
Read pageEmail de prospection : exemple et réécriture en 5 cas
Cinq exemples d’email de prospection pour des cibles PME et TPE françaises : la version longue qui n’obtient rien, la réécriture courte, et la raison de chaque changement.
Read pageFichier SIRENE : prospection B2B depuis le registre
Fichier SIRENE, prospection B2B : comment tirer du registre public une liste propre, filtrée par code NAF, département et effectif, sans acheter un fichier.
Read pageProspection artisans par email : court, concret, une demande
La prospection artisans par email ne ressemble pas au cold email SaaS : un fait vrai, quatre phrases, une demande simple, leurs horaires. Voici ce qui fait répondre.
Read pageTrouver l’email d’une entreprise dans ses mentions légales
Trouver email entreprise : la méthode passe par les mentions légales que tout site professionnel français doit afficher. Comment les lire, quoi rejeter, pourquoi vérifier.
Read pageVérifier une adresse email avant d’envoyer : la méthode
Comment vérifier une adresse email trouvée sur un site avant de lui écrire : syntaxe, MX, test SMTP, catch-all, adresses de remplissage, et ce qu’un rebond coûte à votre domaine.
Read pageAre Email Addresses Case Sensitive? A Practical Guide
Email address case sensitivity explained for developers, with safe rules for storage, comparison, deduplication, sign-in, sending, and provider-specific aliases.
Read pageSMTPUTF8 and International Email Addresses: A Practical Guide
A practical SMTPUTF8 guide for accepting, storing, sending to, and troubleshooting international email addresses without confusing Unicode local parts with IDN domains.
Read pageSMTP Envelope vs Email Headers: A Practical Guide
SMTP envelope vs email headers explained with a practical workflow for debugging recipients, bounces, Bcc delivery, forwarding, and sender identity.
Read pageDark Mode Email Design: A Practical Compatibility Guide
A practical dark mode email design workflow for protecting contrast, logos, buttons, images, and hierarchy when inboxes preserve, restyle, or invert your colors.
Read pageMultipart Email: A Practical MIME Implementation Guide
A developer-focused guide to structuring multipart email so plain text, HTML, attachments, and inline resources survive real sending and receiving systems.
Read pageDKIM Key Rotation: A Zero-Downtime Runbook
A practical, zero-downtime DKIM key rotation runbook with selector inventory, DNS overlap, canary validation, rollback criteria, and old-key retirement.
Read pageEmail Threading Headers: Message-ID, In-Reply-To, and References
A practical guide to the headers, data model, sending rules, and tests that keep transactional and support replies in the right email conversation.
Read pageTransactional Email Failover: Keep Critical Messages Sending
A practical operating playbook for keeping password resets, invoices, invites, and lifecycle-critical email moving when the primary sending path degrades.
Read pageEmail A/B Testing: A Practical Framework
A practical email A/B testing guide for planning useful experiments, avoiding false winners, and turning campaign results into repeatable decisions.
Read pageDedicated IP vs Shared IP Email: Which to Use?
A dedicated IP vs shared IP email guide for deciding when to use a shared pool and when a dedicated sending IP is worth the warmup work.
Read pageSMTP Bounce Codes: How to Read and Act on Failed Email
A practical operator guide to SMTP bounce codes: classify failures, choose retries vs suppressions, and build a safer response workflow.
Read pageEmail Template Versioning: Control Changes Before You Send
A practical guide to email template versioning for teams that need safer edits, approvals, QA, rollback, and campaign history before high-volume sends.
Read pageEmail Localization: A Practical Guide for Global Sends
A practical email localization playbook for teams sending newsletters, lifecycle campaigns, and transactional messages across languages and regions.
Read pageEmail Consent Records: What to Store Before You Send
A practical playbook for storing email consent records so teams can prove why someone is eligible, honor opt-outs, and avoid risky list imports.
Read pageEmail UTM Tracking: A Practical Naming System
A practical guide to email UTM tracking for newsletters, lifecycle campaigns, launches, and outbound sequences that need reliable attribution.
Read pageEmail Audit Trail: What to Log Before and After Sends
A practical email audit trail playbook for logging approvals, audience selection, send events, suppressions, replies, and changes without creating a privacy mess.
Read pageEmail Deliverability Incident Response: A Recovery Playbook
A practical incident-response playbook for sudden inboxing drops, bounce spikes, complaint spikes, blocklists, authentication failures, and reputation recovery.
Read pageList-Unsubscribe Header: One-Click Setup Guide
A practical guide to List-Unsubscribe and one-click unsubscribe headers for marketers, SaaS teams, and email operators who want fewer complaints and cleaner suppression.
Read pageEmail Sunset Policy: When to Stop Emailing Inactive Subscribers
A practical email sunset policy playbook for deciding when to pause, re-engage, suppress, or keep inactive subscribers without damaging deliverability.
Read pageEmail Authentication Alignment: SPF, DKIM, and DMARC
A practical email authentication alignment guide for teams that want SPF, DKIM, and DMARC to pass consistently across transactional and marketing mail.
Read pageEmail QA Checklist: Test Campaigns Before You Send
A practical email QA checklist for campaign operators: content review, rendering tests, link checks, personalization, compliance, tracking, and launch controls.
Read pageEmail Idempotency Keys: Prevent Duplicate Sends
A practical framework for using email idempotency keys to make retries safe, prevent duplicate sends, and keep email operations observable.
Read pageEmail Feedback Loops: Complaint Signals and Suppression Workflow
A practical guide to email feedback loops: provider complaint signals, Feedback-ID tagging, suppression rules, monitoring, and operating playbooks.
Read pageEmail Retry Strategy: Practical Backoff and Failure Handling
A practical email retry strategy for deciding what to retry, what to stop, and how to keep failed sends observable without creating duplicates.
Read pageEmail Subdomain Strategy: Separate Mailstreams Safely
A practical email subdomain strategy for separating mailstreams without fragmenting ownership, analytics, suppression, or sender reputation.
Read pageEmail Accessibility Checklist: Design Emails Everyone Can Use
A practical email accessibility checklist for making campaigns easier to read, navigate, understand, and act on across inboxes and assistive technologies.
Read pageSMTP Deferrals: How to Troubleshoot Temporary Email Failures
A practical SMTP deferrals playbook: classify temporary failures, slow the right queue, fix the cause, and avoid turning retries into a deliverability incident.
Read pageEmail List Hygiene: A Practical Maintenance Playbook
A practical email list hygiene framework: diagnose list risk, segment by engagement, verify carefully, suppress correctly, and turn cleanup into a recurring operating rhythm.
Read pageEmail Preheader Text: Practical Best Practices
A practical guide to email preheader text: what it should do, how to write it, how to implement hidden preview copy, and what to test before sending.
Read pageEmail Send Throttling: A Practical Playbook
A practical email send throttling framework for pacing sends by domain, engagement, provider feedback, and risk windows without starving important mail.
Read pageMTA-STS and TLS Reporting for Email Operators
A practical operator guide to MTA-STS and TLS-RPT: what they protect, what records to publish, how to test safely, and what mistakes to avoid.
Read pageEmail Domain Migration Checklist: Move Without Breaking Deliverability
A step-by-step email domain migration checklist for changing sending domains or subdomains without losing authentication, reputation, or suppression history.
Read pageARC Email Authentication: What It Does and When to Use It
A practical guide to ARC email authentication: what it solves, where it helps, where it does not, and how email operators should evaluate it.
Read pageEmail Webhook Events: A Practical Processing Guide
A practical email webhook events playbook for building idempotent ingestion, clean event models, suppression updates, and reliable analytics.
Read pageEmail Deliverability Monitoring: A Practical Playbook
A practical email deliverability monitoring playbook for teams that need early warning signals, weekly checks, and clear incident response steps.
Read pageCustomer Onboarding Email Sequence: A Practical Playbook
A practical customer onboarding email sequence framework for SaaS teams: activation moments, timing, examples, metrics, and pitfalls.
Read pageEmail Cadence Best Practices: How Often to Send
Email cadence best practices for choosing frequency by mailstream, audience intent, engagement, and risk so you can send without exhausting subscribers.
Read pageEmail Reply Rate: How to Measure and Improve It
A practical guide to measuring email reply rate, classifying response quality, diagnosing low replies, and building campaigns that earn real conversations.
Read pageEmail Footer Best Practices: Compliance and Trust
A practical guide to building email footers that satisfy compliance needs, reduce complaints, improve trust, and stay useful on mobile and in plain text.
Read pageEmail Blocklist Removal: A Practical Recovery Playbook
A practical recovery playbook for diagnosing email blocklist listings, fixing the root cause, requesting delisting, and rebuilding sender reputation safely.
Read pageEmail Spam Traps: How to Find and Avoid Them
A practical playbook for understanding email spam traps, investigating list-source risk, cleaning risky segments, and preventing future trap hits.
Read pageEmail Click-Through Rate: A Practical Guide
A practical guide to email click-through rate: what to measure, how to diagnose weak clicks, how to improve calls to action, and when clicks are the wrong success metric.
Read pageEmail Deliverability Audit: A Practical Checklist
A practical email deliverability audit checklist for teams that need to find authentication gaps, list-risk patterns, reputation issues, and workflow fixes before the next send.
Read pageRe-Engagement Email Campaign: A Practical Playbook
A practical re-engagement email campaign playbook: who to target, what to send, when to stop, and how to connect the results to suppression and segmentation.
Read pageEmail Complaint Rate: How to Monitor and Reduce It
Learn how to monitor email complaint rate, diagnose why subscribers mark messages as spam, and reduce complaints with consent, segmentation, unsubscribe, and suppression fixes.
Read pageCustom Email Tracking Domain: A Practical Guide
A practical guide to custom email tracking domains: when to use one, how DNS and redirects work, what to test, and how to avoid deliverability mistakes.
Read pageRole-Based Email Addresses: How to Handle Them
A practical framework for role-based email addresses: which ones are risky, which are useful, and how to manage them without hurting deliverability or missing buying intent.
Read pageSeed List Email Testing: A Practical Guide
A practical seed list email testing workflow for checking inbox placement, rendering, links, authentication, and campaign risk before the real send.
Read pageDMARC Reports Explained: How to Read and Act on Them
A practical guide to DMARC reports: what RUA aggregate files mean, which failures matter, and how to turn reporting into safer email authentication.
Read pageDocker Email Marketing Stack: Tools and Architecture
How to design a Docker-based email marketing stack: which services to containerize, why to separate sending from lists, an example Compose architecture, and the data you must persist.
Read pageEmail Marketing Costs for SaaS: Where the Money Goes
A breakdown of what SaaS email actually costs — sending, contacts/seats, workflow tooling, deliverability, and people — and the pricing models that quietly scale your bill.
Read pageGenerative Engine Optimization (GEO): What It Is
GEO is SEO for AI answer engines. Here's what the term means, what's genuinely new, and what's just good SEO rebranded.
Read pageMailgun vs Postmark vs Resend
Mailgun vs Postmark vs Resend compared for developers: what each is best at, deliverability reputation, developer experience, and pricing model — plus how to choose.
Read pageThe Self-Hosted Email Marketing Stack for Indie Hackers
How to assemble a self-hosted email marketing stack: the sending layer, list/campaign layer, DNS, and workflow — with a concrete example stack for an indie hacker on a budget.
Read pageuseSend vs Mailgun: Open Source vs Managed Email API
Understand where Mailgun and useSend fit in a modern SaaS email stack.
Read pageCoolify Email Marketing Stack for Small SaaS Projects
How to run an email marketing stack on Coolify: the one-click services that fit, how they connect to SES, the deliverability work Coolify doesn't do, and where a workflow layer fits.
Read pageEmail Infrastructure for Indie Hackers
A practical email infrastructure guide for indie hackers: the layers you actually need, build vs buy, cheap stacks, the deliverability work you can't skip, and where to keep it simple.
Read pageEmail Preference Center: A Practical Guide
A practical framework for email preference centers: what choices to offer, what to avoid, and how to connect preferences to suppression and segmentation.
Read pageHow to Deploy useSend (Self-Hosting Options)
A practical overview of deploying useSend on your own infrastructure — hosting paths, SES, DNS — and where a workflow layer fits on top.
Read pageHow to Start an Email Newsletter (Step by Step)
Everything you need to launch a newsletter that people actually read — niche, platform, domain setup, first subscribers, and a sustainable sending rhythm.
Read pageHow to Write a Cold Email That Gets Replies
The anatomy of a cold email people actually answer — relevance, brevity, one clear ask — plus the patterns that get you marked as spam.
Read pageMailgun Alternatives for Startups and Developers
The best Mailgun alternatives for startups and developers — Postmark, Resend, Amazon SES, SendGrid, and self-hosted useSend — compared by deliverability, DX, cost, and ownership.
Read pageOutbound vs Inbound Lead Generation
Outbound buys speed; inbound compounds. Here's how the two lead-gen motions compare and how to balance them by stage.
Read pageReply Inbox Email Workflow in Mailbase
A product guide to the Mailbase reply inbox for teams that want campaign replies, support context, and follow-up work in one place.
Read pageThe Best Time to Send Email (What the Data Says)
There's no magic hour — but there are sensible defaults and a way to find your list's real best time. Here's how to stop guessing.
Read pageWhat Is a Good Email Open Rate? (2026 Benchmarks)
Open-rate benchmarks are a moving target — and privacy proxies have made them noisier than ever. Here's how to read them and what to watch instead.
Read pageWhat Is Apollo.io? A Plain-English Guide
Apollo.io explained without the sales pitch: the database, the finder, the sequencer, and the parts you still need to handle yourself.
Read pageEmail Marketing With Your Own Server: Pros and Cons
The real pros and cons of running email marketing on your own server — including the costly myth of sending from your own IP, what 'own server' should actually mean, and DNS/compliance duties.
Read pageHow to Find a Company's Email Address Format
Once you know a company's email pattern, you can reach anyone there. Here's how to find the format and use it responsibly.
Read pageHow to Find Email Addresses on LinkedIn
LinkedIn is where you find the right person; here's how to turn a profile into a verified work email — the legitimate way.
Read pageHow to Get Your Site Cited by ChatGPT
AI assistants cite a handful of sources per answer. Here's how to make your content one they pull from and link to.
Read pageMailbase Deliverability Controls
A product guide to the deliverability controls Mailbase exposes across sending, analytics, compliance, and Settings.
Read pagePlain Text vs HTML Email: Which Should You Send?
It's not really either/or. Here's how plain text and HTML email actually differ on deliverability and engagement — and why you should send both.
Read pageSelf-Hosted Email Marketing Costs: What You Still Pay For
Self-hosted email isn't free — here's the honest cost breakdown: server, Amazon SES, DNS, monitoring, and your time — and how it still beats per-contact SaaS at scale.
Read pageSendGrid Alternatives for Developers
The best SendGrid alternatives for developers — Postmark, Resend, Mailgun, Amazon SES, and self-hosted useSend — by deliverability, developer experience, pricing, and ownership.
Read pageA Practical useSend Self-Hosted Email Stack
A stack guide for builders running useSend on their own infrastructure.
Read pageB2B Lead Generation With Email: A Founder's Guide
Email is still the highest-leverage B2B lead channel when you combine targeted outreach with opt-in capture and genuine nurture. Here's the system.
Read pageBest Cold Email Software for Outreach
The features that separate good cold email software from the rest — and why deliverability and reply handling matter more than the number of sequence steps.
Read pageBest Open-Source & Self-Hosted Newsletter Tools for Builders
The best open-source, self-hosted newsletter tools compared — Listmonk, Mautic, SendPortal, Keila — what each is good at, the sending layer they still need, and where a workflow layer fits.
Read pageBest Transactional Email Services for Developers
A developer-focused comparison of transactional email services — Postmark, Resend, SendGrid, Mailgun, Amazon SES, and self-hosted useSend — on deliverability, DX, pricing model, and fit.
Read pageDeveloper API and MCP Access in Mailbase
A product guide to Mailbase's REST API, scoped tokens, signed webhooks, and the optional MCP server.
Read pageEmail Unsubscribe Best Practices
Why making unsubscribing easy improves deliverability, how one-click and List-Unsubscribe headers work, what the law requires, and how a preference center reduces opt-outs.
Read pageHow to Grow Your Email List (Without Buying One)
Sustainable list growth comes from giving people a reason to subscribe — here are the tactics that work and the shortcuts that wreck your deliverability.
Read pageHow to Monetize a Newsletter: The Real Options
A newsletter can make money several ways. Here are the real options, what each needs, and why an engaged small list beats a big dead one.
Read pageSales Prospecting: A Practical Guide for Teams
Prospecting is the top of the sales funnel done deliberately. Here's the repeatable process from ICP to qualified conversation.
Read pageSelf-Hosted Email Marketing Software: What You Need to Know
The honest guide to self-hosted email marketing software and platforms — the three layers you run yourself, the open-source applications for each, the deliverability work you can't outsource, and when it's worth it versus a SaaS.
Read pageSPF, DKIM, and DMARC Explained Simply
SPF, DKIM, and DMARC explained in plain English: what each record does, how they work together to authenticate your email, how to set them up, and the common mistakes that break them.
Read pageuseSend vs SendGrid for Developers
A developer-focused comparison of useSend and SendGrid.
Read page11 Cold Email Templates That Get Replies
Copy-and-adapt cold email templates for the most common outreach goals, plus the personalization rules that keep them out of spam.
Read pageApollo.io Alternatives Worth Considering
If Apollo isn't the right fit on data, price, or workflow, here are the alternatives that cover finding, verifying, and sending — and how to choose.
Read pageCold Email Deliverability: A Practical Checklist
Cold outreach lives or dies on deliverability. Here's the checklist that keeps you in the inbox: authentication, warmup, volume, and clean lists.
Read pageDomain Warmup for SaaS Email: A Practical Guide
How to warm up a new sending domain or IP: why it matters, a week-by-week volume ramp, automated warmup, and how to keep reputation once you're warm.
Read pageSMTP Relay for SaaS Apps: What to Use and Why
What an SMTP relay is, when a SaaS app should use one, how it differs from an email API, the providers to consider, and the DNS and production tradeoffs.
Read pageuseSend vs Listmonk: Email Sending vs Newsletter Management
useSend and Listmonk are both builder-friendly, but they sit in different parts of the email stack.
Read pageuseSend vs Postmark: Transactional Email Tradeoffs
A practical useSend vs Postmark guide for transactional email teams.
Read pageBIMI Email Logo Setup: A Practical Guide
BIMI email logo setup can put your brand beside authenticated mail — but only after DMARC, logo, DNS, and certificate work is done.
Read pageBuilding an Email Outreach Strategy That Works
Outreach without a strategy is just spam with extra steps. Here's how to build one — targeting, messaging, cadence, and the metrics that matter.
Read pageCold Email Personalization That Scales
Real personalization is a relevant detail, not a merge tag. Here's how to personalize cold email at scale without sounding like a robot.
Read pageHow to Verify Email Addresses Before You Send
Verifying your list is the cheapest insurance for deliverability. Here's how email verification works and how to build it into your sending.
Read pageHTML Email Best Practices That Actually Render
Email clients are not browsers. Here are the HTML email rules that keep your design intact from Gmail to Outlook — and the traps that break it.
Read pageWhat Is Email Enrichment? A Practical Guide
Email enrichment turns a bare address into a useful profile — company, role, and more. Here's how it works and how to use it responsibly.
Read pageEmail Analytics for Developers: Opens, Clicks, Bounces
A developer's guide to email analytics: which events matter (delivered, bounce, complaint, open, click), why opens are unreliable, and how to wire up webhooks to act on the data.
Read pageRailway useSend Email Stack for Fast Deployment
How to run useSend on Railway for a fast email stack: the deploy path, managed Postgres/Redis, connecting Amazon SES, costs, and where a Mailbase workflow layer fits.
Read pageSelf-Hosted Email vs SaaS Email Platforms
Self-hosted email vs a SaaS platform compared honestly: cost, control, maintenance, deliverability, and data ownership — plus a simple rule for which to choose.
Read pageThe Cold Email Follow-Up Sequence That Works
Most replies come from the follow-up, not the first email. Here's a cadence and a per-touch script that gets responses without annoying people.
Read pageThe Newsletter Welcome Email: How to Get It Right
Your welcome email is your highest-opened send. Here's how to make that first impression set up everything that follows.
Read pageWhat Is an Email Suppression List?
What an email suppression list is, what belongs on it (unsubscribes, bounces, complaints, manual), why it protects sender reputation and keeps you compliant, and how to manage it.
Read pageWhat Is useSend? Open-Source Email for Builders
A practical explanation of useSend, the self-hosted email problem it solves, and how builder-led teams should evaluate it.
Read pageBest Email Marketing Tools for Coolify Users
A Coolify-focused guide to the email tools you can self-host (useSend, Listmonk, Mautic, Plunk), the DNS and SES work involved, and where a Mailbase workflow layer fits.
Read pageCold Email Subject Lines That Get Opened
The subject line decides whether your cold email is read at all. Here's what gets opened — and what gets filtered.
Read pageEmail Deliverability Basics for SaaS Founders
Email deliverability explained for founders: the five things that decide whether you reach the inbox — authentication, reputation, list hygiene, engagement, and compliance — and how to monitor them.
Read pageEmail List Segmentation: A Practical Guide
Sending everything to everyone is why people unsubscribe. Here's how to segment a list so each email is relevant — without drowning in complexity.
Read pageHow to Avoid the Spam Folder: A Practical Checklist
Landing in spam is usually fixable. Here's the checklist — authentication, clean lists, engagement, and content — that keeps real email in the inbox.
Read pageHow to Connect useSend to Mailbase
A careful useSend-to-Mailbase setup guide that separates hosted sending from the BYO useSend workflow.
Read pageMailbase vs lemlist Pricing for Technical Teams
Mailbase vs lemlist on price and model: a per-seat cold-outreach suite versus a flat-priced email workflow layer with managed or bring-your-own useSend sending.
Read pageResponsive Email Design: A Practical Guide
Most people open email on a phone. Here's how to design emails that adapt cleanly to small screens without breaking on desktop clients.
Read pageTransactional Email API Service in Mailbase
A product guide to Mailbase's `/api/v1/send` endpoint and developer platform controls for transactional email.
Read pageWhat Is an Ideal Customer Profile (ICP)?
Your ICP is the filter for everything in outbound. Here's what it is, how to build one from real data, and how to use it.
Read pageAWS SES Email Stack for SaaS Builders
How to think about Amazon SES as part of a SaaS email stack: what SES is and isn't, the layers you build on top of it, the sandbox/SNS setup, and where it fits versus a full API.
Read pageEmail Bounce Management for SaaS Teams
Hard vs soft bounces explained, what causes them, how to handle each, acceptable bounce rates, and why suppressing bounces automatically protects your sender reputation.
Read pageEmail Marketing Tools for VPS Owners
If you own a VPS, here are the email marketing tools that fit, the DNS and SMTP-relay responsibilities a VPS gives you, and the one thing you should not do with it (run an MTA).
Read pageHow to Build a B2B Prospect List That Converts
A targeted list of 200 right-fit prospects beats 5,000 random ones. Here's how to define your ICP and build a list that converts.
Read pageLinkedIn vs Email Outreach: Which Works Better?
LinkedIn or cold email? Each has real strengths. Here's how they compare — and why the best outbound usually uses both together.
Read pageBest Email Finder Tools for Cold Outreach
The email finder tools worth knowing, what each is good at, and how to pick one without overpaying for a database you won't use.
Read pageBest useSend Integrations for SaaS Teams
What to connect around useSend: workflow tools, dashboards, analytics, DNS, and Mailbase.
Read pageCold Email vs Warm Email: What's the Difference?
The difference between cold and warm email is prior relationship — and it changes everything about deliverability, expectations, and results.
Read pageDouble Opt-In vs Single Opt-In: Which to Use
Single opt-in grows faster; double opt-in grows cleaner. Here's the real tradeoff and a simple rule for picking the right one for your list.
Read pageEmail API vs SMTP: Which Should You Use?
Email API vs SMTP compared for SaaS: how each works, reliability, speed, debugging, features, and portability — plus why many teams use both.
Read pageHow to Find Someone's Email Address (10 Ways)
From email finder tools to pattern-matching and verification, here's how to find almost anyone's work email address — and confirm it's real before you send.
Read pageHunter vs Apollo: Which Email Tool Should You Use?
Hunter and Apollo solve overlapping problems differently. Here's how they compare on data, features, and price — and which fits your workflow.
Read pagePostmark Alternatives for Transactional Email
The best Postmark alternatives for transactional email — Resend, Mailgun, Amazon SES, SendGrid, and self-hosted useSend — compared on deliverability, DX, cost, and ownership.
Read pageScheduled Email Campaigns in Mailbase
A product guide to scheduled campaigns now that Mailbase can schedule, reschedule, cancel, and execute sends through durable jobs.
Read pageuseSend vs Resend Pricing: Ownership vs Convenience
useSend vs Resend on price: the self-hosted (server + SES) cost model versus a hosted per-email subscription, where the break-even sits, and which fits your stage.
Read pageWhat Is MJML? The Framework for Responsive Email
MJML lets you write simple, semantic markup and compiles it to the messy, cross-client HTML email needs. Here's what it is and when to use it.
Read pageAI Email Workflow in Mailbase
A product guide to in-context AI drafting, the assistant's task queue, and proposal-first inbox triage.
Read pageCheap Email Marketing Tools for Developers
The genuinely cheap email marketing options for developers — Amazon SES, self-hosted useSend, free tiers, and where the real costs hide — plus how to keep costs low as you scale.
Read pageEmail Marketing for Beginners: A Complete Starter Guide
New to email marketing? Here's the whole picture in plain English — list building, campaigns, deliverability, and the few metrics worth watching.
Read pageEmail Newsletter Ideas to Keep Subscribers Engaged
Stuck on what to send? Here are newsletter content ideas and repeatable formats that keep an audience engaged issue after issue.
Read pageEmail Template Best Practices for Higher Engagement
A good email template is a reusable, tested structure — single CTA, clean hierarchy, mobile-first. Here are the practices that lift engagement.
Read pageHow to Rank in AI Search (ChatGPT, Perplexity, AI Overviews)
AI search answers questions directly and cites sources. Here's how to make your content the one it pulls from.
Read pagellms.txt for SaaS Websites: Useful or Overhyped?
What llms.txt actually is, the honest case for and against adding one, and how it fits with real AI-search visibility.
Read pageOpen-Source Email Marketing Platforms Compared
A comparison of open-source email marketing platforms — Listmonk, Mautic, SendPortal, Plunk, Postal, useSend — by what they actually do (lists, automation, sending) and who each fits.
Read pageTransactional Email for SaaS: The Practical Guide
A practical guide to transactional email for SaaS: what counts as transactional, choosing an API or SMTP provider, templates, deliverability, idempotency, and the operations that keep critical mail flowing.
Read pageTransactional Email vs Marketing Email
Transactional vs marketing email explained: the definitions, the rules each must follow (consent, unsubscribe), why you should separate them, and how the line can blur.
Read pageuseSend vs Resend: Which Email Tool Fits Your Stack?
Compare useSend and Resend without pretending they solve the exact same problem.
Read pageAI Search Optimization for SaaS Websites
AI assistants increasingly answer 'which tool should I use' questions. Here's how a SaaS site earns a place in those answers.
Read pageDurable Email Send Jobs in Mailbase
A product guide to Mailbase's durable send-job pipeline for reliable campaign launches and scheduled sends.
Read pageFree Email Marketing Tools for Developers
The genuinely free email marketing tools for developers — open-source apps and free tiers — what each gives you for free, and the catch (sending still costs, deliverability is still yours).
Read pageHow to Book Meetings With Cold Email
Getting a reply is step one; booking the meeting is the goal. Here's how to make the ask easy and turn cold opens into calendar invites.
Read pageHow to Write a Newsletter People Actually Read
A great newsletter is a habit, not a broadcast. Here's how to write issues people open every time.
Read pageResend Alternatives for SaaS Email
The best Resend alternatives for SaaS email — Postmark, Mailgun, Amazon SES, and self-hosted useSend/Plunk — for different pricing, SMTP behavior, self-hosted control, or workflow needs.
Read page