There are many alternatives to FakeSMTP for Linux if you are looking for a replacement. The best Linux alternative is MailHog, which is both free and Open Source. If that doesn't suit you, our users have ranked more than 10 alternatives to FakeSMTP and five of them are available for Linux so hopefully you can find a suitable replacement. Other interesting Linux alternatives to FakeSMTP are Origami SMTP (Free, Open Source), LunaticSMTP (Free, Open Source), MailDev (Free, Open Source) and MailCatcher (Free, Open Source).
MailHog is an email testing tool inspired by MailCatcher, but easier to install. - Configure your application to use MailHog for SMTP delivery - View emails in the web UI, or through JSON API - Release messages to real SMTP servers for delivery
Origami SMTP was created with the idea to have a fake email server for testing purposes that supported TLS. This is because the code the developer was working on at the time had several hard coded values enforcing TLS so most other solutions would not work.
LunaticSMTP is a dummy SMTP server with desktop GUI for testing email sending applications. To use it, start LunaticSMTP and configure your application to use 'localhost' as it's SMTP server. Now it will catch messages sent to it and allow you to view them.
MailCatcher runs a super simple SMTP server which catches any message sent to it to display in a web interface. Run mailcatcher, set your favourite app to deliver to smtp://127.0.0.1:1025 instead of your default SMTP server, then check out...