How Spamhaus blocklisted my SMTP verifier — a server that never sent an email
In short: I'm building an email verification service that works via live SMTP probing. One day iCloud started rejecting my server with 550 ... rejec…
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[Перевод] Self-hosted почта на arch linux, postfix, dovecot и let's encrypt
В этой статье я покажу, как настроить свой почтовый сервер для аккаунтов локальных пользователей без веб-морд, docker-ов, телеграм-помоек и LLM-высе…
Build a Terraform provider for your side project's API (it's smaller than you think)
Writing a Terraform provider sounds like a big-company activity, something HashiCorp partners do with a team and a roadmap. In practice, if your API…
Как один баг в sendmail создал эру спама и привёл к SPF, DKIM и DMARC
Когда в мае 1978 года Гэри Туерк, маркетолог из Digital Equipment Corporation, отправил 400 сотрудникам ARPANET приглашение на презентацию компьютер…
Outlook.com Is the Final Boss of 'Just Send an Email'
Every email project starts with a lie: "I'll just test it with SMTP real quick." That was my plan while working on EpicMail . I wanted a boring, rep…
Open Source Email Server Setup: The 2026 Infrastructure Guide
The Definitive Guide to Self-Hosted Email Infrastructure in 2026 Why would anyone self-host email in 2026? AWS SES, SendGrid, Mailgun, and Postmark…
KumoMTA vs PowerMTA: The 2026 Enterprise Email Infrastructure Comparison
KumoMTA vs PowerMTA: The Definitive Guide to Enterprise Email Delivery in 2026 When your platform sends 10 million transactional emails a day, the d…
How to Set Up KumoMTA: A Complete Guide for High-Volume Email Senders - Updated 2026 Guide
How to Set Up KumoMTA: A Complete Guide for High-Volume Email Senders KumoMTA's combination of open-source licensing and modern architecture makes i…
Email Authentication Dkim Spf Dmarc - Updated 2026 Guide
Bounce Rate Reduction: The Complete Technical Guide for Email Engineers Bounce rate is the silent killer of email deliverability. A rate above 2% ge…
Bounce Rate Reduction Guide - Updated 2026 Guide
Bounce Rate Reduction: The Complete Technical Guide for Email Engineers Bounce rate is the silent killer of email deliverability. A rate above 2% ge…
Bounce Rate Reduction: The Complete Technical Guide
Bounce rate is the silent killer of email deliverability. A rate above 2% gets you flagged. Above 5% gets you blocked. Most teams don't know they ha…
KumoMTA Setup Guide: From Zero to Production Email
KumoMTA's combination of open-source licensing and modern architecture makes it an attractive choice for teams ready to move beyond legacy MTA solut…