
MailHog
MailCatcher
Mailcatch.app
MailDrop
Postfix
MailMug.net
FakeSMTP
An email and SMTP testing tool that emulates provider send APIs (Resend, SendGrid, SES, …) - maildotnull/maildotnull

Mailtrap
MailHog
Mailosaur
MailCatcher
FakeSMTP
Mailcatch.app
MailMug.net
An email and SMTP testing tool with API for developers.

Which is more popular?
Based on our record, Mailpit seems to be more popular. It has been mentioned 6 times since March 2021.
Website, pricing, platforms and company facts side by side.
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What each product offers, as listed by its team.


No features have been listed yet.
Possible disadvantages
How often each product is chosen within a category, 0–100% relative to the other.


Share your experience with using MailDotNull and Mailpit. For example, how are they different and which one is better?
Recommendations tracked on public social media and blogs since March 2021.


Tracking MailDotNull since Nov 2026.
If you can run a container in your test environment, Mailpit is excellent, open source and runs next to your app, and it is the better choice when everything must stay on your own network. A hosted inbox earns its place when you cannot... - Source: dev.to / 8 days ago
I'm using Mailpit, an Open Source email testing tool. It can be installed following the instructions in the Installation section of the official repository, or by using Docker. - Source: dev.to / 9 months ago
It really only likely matters if you're one of those who is tempted to let it run on `0.0.0.0` instead of loopback only. Assuming you're not, there's certainly no urgency to migrate. But keep it in the back of your mind that it's... - Source: Hacker News / almost 2 years ago
When comparing MailDotNull and Mailpit, you can also consider the following products.

MailHog is an email testing tool inspired by MailCatcher, but easier to install.
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Modern email delivery platform for developers and product teams
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MailCatcher runs a super simple SMTP server which catches any message sent to it to display in a...
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An email sandbox to inspect and debug emails in dev, staging, and QA environments before sending them to recipients in production.
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maildrop is a Mail delivery agent used by the Courier Mail Server. The maildrop MDA also includes filtering functionality. maildrop receives mail via stdin and delivers in both Maildir and mbox formats.
Compare MailDrop to MailDotNull or Mailpit: