This free smtp server is a capture all server , which will log emails sent to it. You can use it for testing email functionality of your application.
A SMTP (Simple Mail Transfer Protocol) Server is a protocol for sending, reciving and realying mail.
This service does not require any authentication at the moment.
Most commong ports are 25, 465, 587 or 2525.
Emails are stored for 48 hours and then deleted automatically .
SendinBlue allows 300 emails per day - SendInBlue.