How to Test SMTP Server from the Command Line via Telnet and ...
mailtrap.io › blog › how-to-test-smtp-serverJul 26, 2016 · Test SMTP simply sends requests to SMTP servers to perform Relaying tests. This service does not have a sufficient toolkit for a proper SMTP examination. testsmtp.tcsoftware.net. http://testsmtp.tcsoftware.net/ Check SMTP works for certain parts of a process but isn’t enough for a proper examination. Does not provide a secure connection. Check SMTP will run the following tests: Check your server DNS Black List status
How to Test SMTP Relay | Mailtrap
https://mailtrap.io/blog/test-smtp-relay24.09.2019 · Let’s check out how smtp-cli works. First, we’ll test the localhost. We’ll connect to the server and observe the basic SMTP back and forth. $ ./smtp-cli --verbose --server localhost [220] 'localhost ESMTP Postfix' > EHLO localhost [250] 'localhost' [250] 'PIPELINING' [250] 'SIZE 20480000' [250] 'ETRN' [250] '8BITMIME' > QUIT [221] 'Bye'