DKIMpy Milter vs MailHog
A side-by-side comparison of two self-hosted mail servers options — licensing, setup difficulty, resource needs, and what each one replaces.
Not the right match-up?
DKIMpy Milter
DKIM signing and verification milter for mail servers
VS
MailHog
Email testing tool with a fake SMTP server
| Feature | DKIMpy Milter | MailHog |
|---|---|---|
| Category | Mail Servers | Mail Servers |
| License | GPL-2.0 | MIT |
| Language | Python | Go |
| Setup difficulty | Medium | Easy |
| Min. RAM | 64 MB | 64 MB |
| Deployment | bare-metal, source | docker, binary, source |
| GitHub stars | ★ 20 | ★ 16,107 |
| First released | 2018 | 2014 |
| Replaces | Hosted email authentication | Mailtrap |
Why pick each one
Choose DKIMpy Milter if…
- Released under the GPL-2.0 license
- Written in Python
- Tiny footprint — runs in 64 MB RAM
Choose MailHog if…
- Released under the MIT license
- Easy to set up — beginner-friendly
- First-class Docker support for quick deployment
- Mature project with 16.1k GitHub stars
Frequently asked questions
Is DKIMpy Milter or MailHog better?
MailHog is the stronger all-round pick: it has both the larger community and the simpler easy setup. Consider DKIMpy Milter if its specific feature set fits your needs better.
Are DKIMpy Milter and MailHog free and open-source?
Yes. DKIMpy Milter is licensed under GPL-2.0 and MailHog under MIT. Both can be self-hosted at no software cost.
Can I run DKIMpy Milter and MailHog with Docker?
DKIMpy Milter: check the project docs for container support. MailHog: yes.