Docker Mailserver
Mail ServersProduction-ready, config-driven mail server in a container
Replaces Google Workspace, Microsoft 365
Easiest Mail Servers to self-host
23 mail servers apps that are easy to get running, ranked by verified deploy effort, project health, and popularity. 2 have a verified ≈5-minute Docker setup.
Mail-in-a-Box
Mail ServersTurn a fresh server into a working mail server
Replaces Google Workspace, Microsoft 365
listmonk
Mail ServersSelf-hosted newsletter and mailing list manager
Replaces Mailchimp, Sendinblue
Mailpit
Mail ServersEmail and SMTP testing tool with web UI
Replaces Mailtrap, MailHog
Roundcube
Mail ServersBrowser-based IMAP webmail client
Replaces Gmail, Outlook Web
Mox
Mail ServersModern, secure all-in-one mail server
Replaces Google Workspace, Microsoft 365
Keila
Mail ServersOpen-source newsletter tool for senders
Replaces Mailchimp, Sendinblue
smtp4dev
Mail ServersFake SMTP server for development email testing
Replaces Mailtrap
MailCatcher
Mail ServersCatch-all SMTP server for inspecting test email
Replaces Mailtrap
Afterlogic WebMail Lite
Mail ServersFree webmail front-end for IMAP and SMTP servers
Replaces Gmail, Outlook Web
SnappyMail
Mail ServersLightweight, fast and modern webmail client
Replaces Gmail, Outlook Web
MailHog
Mail ServersEmail testing tool with a fake SMTP server
Replaces Mailtrap
Mailspring
Mail ServersCross-platform desktop email client
Replaces Outlook, Apple Mail
Betterbird
Mail ServersCommunity-enhanced fork of the Thunderbird email client
Replaces Microsoft Outlook
getmail6
Mail ServersFlexible mail retrieval tool for POP3 and IMAP
Replaces fetchmail
Nextcloud Mail
Mail ServersIMAP webmail client integrated into Nextcloud
Replaces Gmail
msmtp
Mail ServersLightweight SMTP client for sending mail
Replaces Sendmail
DragonFly Mail Agent
Mail ServersTiny mail transfer agent for outbound delivery
Replaces Sendmail, Postfix
Sieve Editor
Mail ServersGraphical editor for Sieve mail filtering scripts
Replaces Gmail filters
mpop
Mail ServersSmall POP3 client for retrieving mail
Replaces fetchmail
swaks
Mail ServersSwiss Army knife for SMTP testing
Replaces Mailtrap
Nullmailer
Mail ServersSimple relay-only mail transfer agent
Replaces Sendmail
Claws Mail
Mail ServersLightweight and fast GTK email client
Replaces Microsoft Outlook
No apps match these filters.
The shortlist at a glance
| App | Deploy effort | Difficulty | Min. RAM | License | ★ Stars |
|---|---|---|---|---|---|
| Docker Mailserver | ≈5-minute setup | Medium | 2,048 MB | MIT | 19,533 |
| Mail-in-a-Box | ≈5-minute setup | Easy | 1,024 MB | CC0-1.0 | 15,438 |
| listmonk | Under-an-hour setup | Easy | 512 MB | AGPL-3.0 | 23,776 |
| Mailpit | Under-an-hour setup | Easy | 64 MB | MIT | 10,636 |
| Roundcube | Under-an-hour setup | Easy | 256 MB | GPL-3.0 | 7,217 |
| Mox | Under-an-hour setup | Easy | 256 MB | MIT | 5,895 |
| Keila | Under-an-hour setup | Easy | 512 MB | AGPL-3.0 | 2,232 |
| smtp4dev | Under-an-hour setup | Easy | 128 MB | GPL-3.0 | 3,998 |
| MailCatcher | Under-an-hour setup | Easy | 128 MB | MIT | 6,778 |
| Afterlogic WebMail Lite | Under-an-hour setup | Easy | 256 MB | AGPL-3.0 | 362 |