SMTP Bucket is described as 'A fake SMTP server for e-mail integration testing. We capture all the e-mails we receive and make them available via our website and REST API' and is an website in the development category. There are more than 10 alternatives to SMTP Bucket, not only websites but also apps for a variety of platforms, including Windows, Linux, Mac and BSD apps. The best SMTP Bucket alternative is Mailpit, which is both free and Open Source. Other great sites and apps similar to SMTP Bucket are MailHog, Papercut, FakeSMTP and MailCatcher.
Mailsnag lets you build resilient SMTP integrations while protecting you from spamming customers during testing on QA and Staging environments. It is like Chaos Monkey for SMTP integrations.
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