today I found that some messages stay in the mail queue.
Mar 1 11:06:29 mail postfix/smtp: 09CE8A0088C: firstname.lastname@example.org, relay=out.alice.it[22.214.171.124]:25, delay=4077, delays=3762/0/0.
17/315, dsn=4.4.2, status=deferred (lost connection with out.alice.it[126.96.36.199] while sending message body)
This seems to happen with messages that are bigger than 1 MB, or so.
What can i do?
Can be caused by smtp_data_xfer_timeout parameter?
I'm using Nethserver 7 up to date to the last version