I also tried sending one email to ictfax server in order to send it as fax.
I see on mail log
Oct 9 16:08:12 email2fax sendmail: q99D8Cnp003450: <firstname.lastname@example.org>... User unknown
Oct 9 16:08:12 email2fax sendmail: q99D8Cnp003450: from=<email@example.com>, size=0, class=0, nrcpts=0, proto=ESMTP, daemon=MTA, relay=mail-lb0-f169.google.com [18.104.22.168]
I send email from the same account user has in drupal. All dens records are fine, as email arrives to my server, but does not get processed at all
Can you help on this also