iRedMail vs Postal
| Tagline | Full-featured open-source mail server built on Postfix and Dovecot, installable in minutes | Self-hosted mail delivery platform, a SendGrid/Mailgun alternative |
| Category | Email & Newsletters | Email & Newsletters |
| Replaces | Gmail / Google Workspace, SendGrid, Mailchimp | SendGrid |
| GitHub stars | 1.8k | 17k |
| Language | Shell | Ruby |
| License | GPL-3.0 | MIT |
| Self-host difficulty | 3/5 Moderate | 4/5 Involved |
| Deploy options | Manual | Docker Docker Compose Manual |
| Managed hosting | ||
| Last updated | 24 days ago | 9 days ago |
| View repo | View repo |
Where each falls short
The honest trade-offs — what you give up with each, versus the proprietary tools they replace.
iRedMail
- Full admin panel (iRedAdmin-Pro) requires a paid license; free admin panel is limited
- Designed for dedicated servers only; Docker or container-based installs are unofficial
- No built-in newsletter or bulk email campaign features
- Upgrades between major versions require careful manual steps
Postal
- You are responsible for IP reputation, warmup, and deliverability
- Requires MariaDB, RabbitMQ, and DNS/DKIM configuration to run
- No marketing-campaign UI — it is a delivery engine, not a newsletter builder
- Less hand-holding than managed providers for spam/blocklist issues
Bottom line
Choose iRedMail if you want the lower-effort setup; choose Postal for the larger community and ecosystem. Postal has seen more recent development. Open each guide below for deploy steps and the full feature gap.
iRedMail
Full-featured open-source mail server built on Postfix and Dovecot, installable in minutes