The following is in my logs. I have no server called nan.vex.net and no user called aida.wanda. I don't see anything in main.cf that looks like a wild card entry. Can anyone suggest why I would be accepting this message in the first place? I really don't want to back-scatter.
May 22 20:11:59 smaug postfix/smtpd[5457]: BBA8F3F9F1CA: client=mx-n07.wc1.phx1.stabletransit.com[207.246.241.253] May 22 20:11:59 smaug postfix/cleanup[8796]: BBA8F3F9F1CA: message-id=<20170523001149.8c76f642...@mx-n07.wc1.phx1.stabletransit.com> May 22 20:12:00 smaug postfix/qmgr[347]: BBA8F3F9F1CA: from=<d...@stabletransit.com>, size=22692, nrcpt=1 (queue active) May 22 20:12:00 smaug postfix/smtp[9232]: BBA8F3F9F1CA: to=<aida.wa...@nan.vex.net>, relay=none, delay=0.34, delays=0.33/0.01/0/0, dsn=5.4.6, status=bounced (mail for nan.vex.net loops back to myself) May 22 20:12:00 smaug postfix/bounce[3630]: BBA8F3F9F1CA: sender non-delivery notification: 1D2793F9F1D8 May 22 20:12:00 smaug postfix/qmgr[347]: BBA8F3F9F1CA: removed -- D'Arcy J.M. Cain System Administrator, Vex.Net http://www.Vex.Net/ IM:da...@vex.net VoIP: sip:da...@vex.net