Courier Mail Server vs Kolab
Courier Mail Server
courier-mta.org
Kolab
kolab.orgSide by side
| Figure | Courier Mail Server | Kolab |
|---|---|---|
| Price from | Free | Free |
| Free plan | Yes | Yes |
| Free trial | — | — |
| Open source | — | — |
| Web | — | Yes |
| Windows | — | Yes |
| macOS | — | Yes |
| Linux | Yes | Yes |
| iOS | — | Yes |
| Android | — | Yes |
| API | — | Yes |
| Self-hosted | Yes | Yes |
| Plans published | 1 | 1 |
| Spec score · Mail Server Software | 8.5 (#1) | 8.0 (#11) |
| Deployment | It can act as an intermediate mail relay, receive mail for multiple domains, or do both. | Kolab is packaged as containers that can run on one host or be distributed across a larger environment. |
| Product | Courier is an integrated mail and groupware server providing ESMTP, IMAP, POP3, webmail, and mailing list services. | Kolab is a free and open-source communication and collaboration solution that can be run on your own infrastructure. |
| 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 lists PGP, two-factor authentication, DKIM/DMARC and spam protection among its email security features. |
Plans
In their own words
Courier Mail Server
Courier Mail Server has no write-up on Specifiction yet; its figures are above.