Cost / License
- Free
- Open Source (MIT)
Platforms
- Mac
- Windows
- Linux

MailSpons is described as 'Fake SMTP server for safe email testing. Stop accidentally spamming your customers' and is a Mail Server in the development category. There are more than 25 alternatives to MailSpons for a variety of platforms, including Web-based, Windows, Linux, Mac and SaaS apps. The best MailSpons alternative is Mailpit, which is both free and Open Source. Other great apps like MailSpons are MailHog, Mailcatch.app, Mailtrap and Papercut.

MailHog is an email testing tool inspired by MailCatcher, but easier to install.

An email sandbox to inspect and debug emails in dev, staging, and QA environments before sending them to recipients in production.

Mailtrap is an Email Delivery Platform for businesses and individuals to Test, Send, and Control their email infrastructure performance.



Papercut is a simplified SMTP server designed to only receive messages (not to send them on) with a GUI on top of it allowing you to see the messages it receives.




Capture SMTP traffic from staging and dev environments. Easily validate email content text or HTML/CSS. Utilize an Email Sandbox to thoroughly examine and troubleshoot emails within staging, development, and quality assurance (QA) environments prior to sending them to recipients...

FakeSMTP is a Free Fake SMTP Server with GUI for testing emails in applications easily. It is written in Java.



Generate temporary, anonymous email addresses with web-based inboxes designed to avoid spam, verify signups, and protect privacy, without requiring registration, passwords, or personal info. Use for website tests and short-term communication needs.

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 http://127.0.0.

EmailVoid is email message receive service that provides API to check that message reaches your expectation.



Create email addresses on demand. Send and receive real emails and attachments from code. Rest API and developer kits available.
