Re: debug SMTP commands sent/received to/from the submission service

Plutocrat wrote:

On 09/04/2021 15.13, Victor Sudakov wrote:

...

I'd use Wireshark but the communication between SMTP clients and Dovecot is encrypted after STARTTLS, so Wireshark is pretty useless here.

You might get some useful information connecting with openssl s_client

Here's a page googled at random. https://halon.io/blog/how-to-test-smtp-servers-using-the-command-line/

Maybe I had phrased my question incorrectly, but I am interested in snooping the exchange between Dovecot and an SMTP client (PHP Mailer in my case), not in manual sending of SMTP commands.

-- Victor Sudakov VAS4-RIPE http://vas.tomsk.ru/ 2:5005/49@fidonet