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>. -- Mark Sapiro <[email protected]> The highway is for gamblers, San Francisco Bay Area, California better use your sense - B. Dylan ------------------------------------------------------ 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
