MailHog
Mail ServersEmail testing tool with a fake SMTP server
Replaces Mailtrap
Best Single-User Mail Servers for self-hosting
The 4 best Single-User mail servers you can self-host, ranked by community traction.
Mailpile
Mail ServersPrivacy-focused, searchable email client
Replaces Gmail
MailCatcher
Mail ServersCatch-all SMTP server for inspecting test email
Replaces Mailtrap
Nullmailer
Mail ServersSimple relay-only mail transfer agent
Replaces Sendmail
No apps match these filters.
At a glance
| App | Deploy effort | Difficulty | Min. RAM | License | ★ Stars |
|---|---|---|---|---|---|
| MailHog | Under-an-hour setup | Easy | 64 MB | MIT | 16,184 |
| Mailpile | Read-the-docs project | Medium | 512 MB | AGPL-3.0 | 8,811 |
| MailCatcher | Under-an-hour setup | Easy | 128 MB | MIT | 6,778 |
| Nullmailer | Read-the-docs project | Easy | 16 MB | GPL-2.0 | 199 |
Quick picks
- Most adopted: MailHog (16,184 GitHub stars).
- Lightest footprint: Nullmailer (from 16 MB RAM, against 512 MB for the heaviest here).
- Licensing: 2 of 4 use MIT; check the rest individually if you plan to modify and redistribute.
Every option here is open-source and self-hostable, tagged Single-User within the mail servers category. Deploy effort is graded from published container recipes, not vendor claims — see the methodology.