MailCatcher is described as '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' and is an app in the office & productivity category. There are more than 25 alternatives to MailCatcher for a variety of platforms, including Web-based, Mac, Linux, Windows and SaaS apps. The best MailCatcher alternative is MailDrop, which is both free and Open Source. Other great apps like MailCatcher are MailHog, Mailpit, Mailcatch.app and Email.ML.
MailDrop is a free throwaway e-mail address. It's temporary. It's transient. It's disposable. It's meant for those times when you don't want to give out your real address. Just give someone any e-mail address in the maildrop.
MailDrop is the most popular Web-based alternative to MailCatcher.
MailDrop is the most popular Open Source & free alternative to MailCatcher.
MailHog is an email testing tool inspired by MailCatcher, but easier to install.
Almost everyone thinks MailHog is a great MailCatcher alternative.
MailHog is the most popular Windows, Mac & Linux alternative to MailCatcher.
An email sandbox to inspect and debug emails in dev, staging, and QA environments before sending them to recipients in production.
A minimalist temporary email service. Privacy-friendly, valid for 1 hour, AD friendly, 100% run on Cloudflare.
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...
Mailtrap is an Email Delivery Platform for businesses and individuals to Test, Send, and Control their email infrastructure performance.
FakeSMTP is a Free Fake SMTP Server with GUI for testing emails in applications easily. It is written in Java.
TempuMail is Temp Mail, also known as Temporary Email, Disposable Email, or Fake Email, is an online service that provides users with a temporary email address. This type of email address can be used to protect your privacy when making online purchases, signing up for online...
Email Testing for QA & Development Teams. Catch every email your product sends, analyze it's contents, follow links and test deliverability all via the Mailosaur API.
Mailosaur is the most popular commercial alternative to MailCatcher.
Ethereal is a fake SMTP service, mostly aimed at Nodemailer users (but not limited to). It's a completely free anti-transactional email service where messages never get delivered.
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.
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Works out of the box without depending on Ruby gems