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GLGabe LGmailkite.hashnode.dev6d ago · 3 min read

MailKite Server: our SMTP + IMAP edges are now open source

TL;DR: the mail-server half of MailKite is now open source: github.com/mailkite/server — the Haraka MX edge, the SMTP submission edge, the IMAP server, a zero-dependency SQLite backend, and a web cons

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Hhashnodetomatoesrun.hashnode.devJul 28 · 5 min read

Catch-all email aliasing: a different address for every service (Haraka + SRS + DKIM)

Most people use the same email address everywhere. One breach and it leaks for years. The known fix is a different alias per service — but every tool I tried made me create each alias upfront. I wante

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SPSMTP Providersmtp-tips-tricks.hashnode.devJun 17 · 5 min read

SMTP API Integration: A Practical Guide for Developers

Email remains one of the most important communication channels for modern applications. Whether you're building a SaaS platform, eCommerce store, CRM, or customer portal, reliable email delivery is es

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GOGaetano Osurgaetano-osur.hashnode.devJun 7 · 15 min read

Email Protocols Explained: SMTP, IMAP, POP3 and the Security Gaps You Need to Know

Why Email Protocols Matter More Than You Think Every day, over 300 billion emails are sent across the internet. Most people treat email as a simple send-and-receive system. You type a message, hit sen

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SLSiddharth Lalsiddharthlal.hashnode.devMay 9 · 13 min read

Why Your SMTP Verifier Fails: IP Reputation, Spamhaus, rDNS & the Invisible Layer of Email Infrastructure

The Bug That Wasn't a Bug If your SMTP verifier is timing out, your code might be perfect — and still completely irrelevant. My system was doing everything right. Clean SMTP state machine. Proper MX r

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SAShafqat Awancodingmavrick.hashnode.devMay 8 · 2 min read

Automating SMS Delivery With Python In 120 Seconds (No Twilio Or Bots Required)

In the 2026 development landscape, automating communication without relying on third-party APIs is a critical skill for reducing operational overhead. This tutorial demonstrates how to leverage cellular carrier gateways to send text messages directly...

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SLSiddharth Lalsiddharthlal.hashnode.devApr 14 · 4 min read

Why Brute Force Fails: Scaling a Backend System Under Real-World Load

When I first architected an email verification system, the mental model was deceptively simple: validate the syntax, check the DNS records, ping the SMTP server, and return the result. Client → API →

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CSCyril Sebastiantech.cyrilsebastian.comMar 14 · 8 min read

From Zero to Production: Building Postfix + AWS SES in 2 Hours

What You Need Before Starting AWS account with SES access EC2 instance (t3a.medium, Amazon Linux 2023) Your domain's DNS access 2 hours of focused time That's it. Everything else, we'll build to

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PAPiyush Agrawalblog.devopswithpiyush.inMar 10 · 8 min read

Build Your Own SMTP Mail Server on AWS EC2 Using Node.js — A Complete Hands-On Guide

Introduction Ever wondered what really happens when you click "Send" on an email? Behind the scenes, a chain of DNS lookups, protocol handshakes, and server communications takes place — all orchestrat

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DGDevTools Guidedevtoolsguide.hashnode.devMar 3 · 8 min read

Email for Developers: Transactional Email, SMTP, Authentication, and Local Testing

Email for Developers: Transactional Email, SMTP, Authentication, and Local Testing Email is deceptively hard. Sending a password reset email sounds simple until you discover that Gmail silently drops your messages, your domain has no SPF record, and ...

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#smtp

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Trending tags this week

MailKite Server: our SMTP + IMAP edges are now open source

Catch-all email aliasing: a different address for every service (Haraka + SRS + DKIM)

SMTP API Integration: A Practical Guide for Developers

Email Protocols Explained: SMTP, IMAP, POP3 and the Security Gaps You Need to Know

Why Your SMTP Verifier Fails: IP Reputation, Spamhaus, rDNS & the Invisible Layer of Email Infrastructure

Automating SMS Delivery With Python In 120 Seconds (No Twilio Or Bots Required)

Why Brute Force Fails: Scaling a Backend System Under Real-World Load

From Zero to Production: Building Postfix + AWS SES in 2 Hours

Build Your Own SMTP Mail Server on AWS EC2 Using Node.js — A Complete Hands-On Guide

Email for Developers: Transactional Email, SMTP, Authentication, and Local Testing