Courier Mail Server vs poste.io
Courier Mail Server
courier-mta.orgposte.io
poste.ioSide by side
| Figure | Courier Mail Server | poste.io |
|---|---|---|
| Price from | Free | $29.08/mo |
| Free plan | Yes | Yes |
| Free trial | — | — |
| Open source | — | — |
| Web | — | Yes |
| Linux | Yes | Yes |
| API | — | Yes |
| Self-hosted | Yes | Yes |
| Plans published | 1 | 3 |
| Spec score · Mail Server Software | 8.5 (#1) | 8.0 (#13) |
| Integrations | The server can use LDAP, MySQL, or PostgreSQL-based authentication databases and supports LDAP-based mail routing. | The documentation describes an Elasticsearch integration for PRO log viewing and names Uptime Kuma, Prometheus, and Grafana as external monitoring systems that can use its monitoring API. |
| Product | Courier is an integrated mail and groupware server providing ESMTP, IMAP, POP3, webmail, and mailing list services. | Poste.io is a self-hosted email server with web administration, webmail, spam protection, and mail server components in one Docker container. |
| Security | Courier supports STARTTLS and SSL for ESMTP, IMAP, POP3, and webmail; its ESMTP client can require a certificate signed by a trusted root CA. | The feature page states that TLS is used on every protocol, passwords use salted SHA512, and SPF, DKIM, DMARC, and SRS are supported. |
| Support | The site lists an unmoderated courier-users mailing list for questions, bug reports, and comments, plus a separate read-only announcement list. | The pricing page includes email support with PRO and PRO+, while FREE is marked as not including it. |
Plans
In their own words
Courier Mail Server
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