Dear Mark, thank you for your helpful reply although your answer shows that my question was off the list topic.
Am 10.05.2016 um 17:24 schrieb Mark Sapiro: > On 5/9/16 2:04 PM, Kala Balik wrote: >> >> today we ran our first mailing over our new Mailman instance. We >> received a few bounces and the following email which left me clueless. >> >> Please, what is this message trying to tell me? Is this us sending out, >> or is this someone trying to answer to our mailing (and failing to log >> in via TLS)? I checked my /var/log/mail logs - to no avail. > > > This apparently has nothing directly to do with Mailman on your server. > > >> Transcript of session follows. >> >> Out: 220 lists.domain.tld ESMTP Postfix (Ubuntu) >> In: EHLO dd11328.otherdomain.tld >> Out: 250-lists.domain.tld >> Out: 250-PIPELINING >> Out: 250-SIZE 10240000 >> Out: 250-VRFY >> Out: 250-ETRN >> Out: 250-STARTTLS >> Out: 250-ENHANCEDSTATUSCODES >> Out: 250-8BITMIME >> Out: 250 DSN >> In: STARTTLS >> Out: 454 4.7.0 TLS not available due to local problem >> In: MAIL FROM:<> SIZE=236 >> Out: 250 2.1.0 Ok >> In: RCPT TO:<[email protected]> >> ORCPT=rfc822;[email protected] >> Out: 250 2.1.5 Ok >> In: RSET >> Out: 250 2.0.0 Ok >> In: QUIT >> Out: 221 2.0.0 Bye > > > It looks to me like the server that identifies itself as > dd11328.otherdomain.tld started to send a message (probably a legitimate > bounce of a list message) to <[email protected]>. It send > the RCPT TO:, was sent an OK in reply and then instead of sending the > DATA, reset the connection and quit. Possibly this is because the > sending server requires TLS which your Postfix says is not available. > > Why your Postfix decided to notify you of this is a Postfix question. > > I suggest you set both > > smtp_tls_security_level = may > > and > > smtpd_tls_security_level = may > > in your Postfix main.cf so that you accept incoming TLS if offered and > offer outgoing TLS. You will also need to set smtpd_tls_cert_file and > smtpd_tls_key_file and maybe others. See > <http://www.postfix.org/TLS_README.html>. > Will implement these postfix changes as soon as possible. Cordially, KB ------------------------------------------------------ Mailman-Users mailing list [email protected] https://mail.python.org/mailman/listinfo/mailman-users Mailman FAQ: http://wiki.list.org/x/AgA3 Security Policy: http://wiki.list.org/x/QIA9 Searchable Archives: http://www.mail-archive.com/mailman-users%40python.org/ Unsubscribe: https://mail.python.org/mailman/options/mailman-users/archive%40jab.org
