Network Tools: DNS,IP,Email
DNS and Network troubleshooting and diagnostic tools integrated into one sweet interface.
rnwood/smtp4dev
smtp4dev - the fake smtp email server for development and testing - rnwood/smtp4dev
tweedegolf/mailcrab
Email test server for development, written in Rust - tweedegolf/mailcrab
axllent/mailpit
An email and SMTP testing tool with API for developers - axllent/mailpit
Newsletters spam test by mail-tester.com
mail-tester.com is a free online service that allows you to test your emails for Spam, Malformed Content and Mail Server Configuration problems
Learn and Test DMARC
Learn and Test DMARC