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MailCatcher vs MailHog: What are the differences?

Developers describe MailCatcher as "An email testing tool". It runs a super simple SMTP server which catches any message sent to it to display in a web interface. It catches all mail and stores it for display. It shows HTML, Plain Text and Source version of messages, as applicable. On the other hand, MailHog is detailed as "Web and API based SMTP testing". It is an email testing tool for developers. You can configure your application to use MailHog for SMTP delivery. You can view messages in the web UI, or retrieve them with the JSON API.

MailCatcher and MailHog belong to "Email Testing" category of the tech stack.

Some of the features offered by MailCatcher are:

  • Runs as a daemon in the background, optionally in foreground. Sendmail-analogue command
  • catchmail, makes using mailcatcher from PHP a lot easier
  • Keyboard navigation between messages

On the other hand, MailHog provides the following key features:

  • ESMTP server implementing RFC5321
  • Support for SMTP AUTH (RFC4954) and PIPELINING (RFC2920)
  • Web interface to view messages (plain text, HTML or source)

MailCatcher and MailHog are both open source tools. MailHog with 5.16K GitHub stars and 342 forks on GitHub appears to be more popular than MailCatcher with 4.74K GitHub stars and 457 GitHub forks.

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