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

Victor Sudakov vas at
Fri Apr 9 19:40:05 EEST 2021

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.

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
2:5005/49 at fidonet
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