Hi, I have a postfix using as a mail proxy. In our environment, I use transport_maps(memcache). I create in memcache a wildcard * with status bounce 500 No such user here. When the MTA(exchange) bounce the message it returns to the same postfix and it checks if the recipient exists, but it's a bounce message and the sender sometimes doesn't exist inside the environment.
MAILLOG: [root@SERVER01 ~]# cat /var/log/maillog | grep 39B2E3E845 Oct 18 17:09:10 SERVER01 postfix/smtpd[18476]: 39B2E3E845: client=mx.MYDOMAIN.com[222.222.222.222] Oct 18 17:09:10 SERVER01 postfix/cleanup[41577]: 39B2E3E845: message-id=<cy4pr1601mb13365592c194b551dc564d2ac5...@cy4pr1601mb1336.namprd16.prod.outlook.com> Oct 18 17:30:07 SERVER01 postfix/qmgr[35700]: 39B2E3E845: from=<miguel_flores_san...@hotmail.com>, size=44864113, nrcpt=1 (queue active) Oct 18 17:30:07 SERVER01 postfix/smtp[43114]: 39B2E3E845: to=<mig...@mydomain.com>, relay=EXCHANGE[111.111.111.111]:2525, delay=1257, delays=1257/0.01/0.01/0, dsn=5.3.4, status=bounced (message size 44864113 exceeds size limit 36700160 of server EXCHANGE[111.111.111.111] Oct 18 17:30:07 SERVER01 postfix/bounce[43115]: 39B2E3E845: sender non-delivery notification: 5F5013E85A Oct 18 17:30:07 SERVER01 postfix/qmgr[35700]: 39B2E3E845: removed [root@SERVER01 ~]# cat /var/log/maillog | grep 5F5013E85A Oct 18 17:30:07 SERVER01 postfix/cleanup[41577]: 5F5013E85A: message-id=<20171018193007.5f5013e...@server01.spo2.umbler.com> Oct 18 17:30:07 SERVER01 postfix/bounce[43115]: 39B2E3E845: sender non-delivery notification: 5F5013E85A Oct 18 17:30:07 SERVER01 postfix/qmgr[35700]: 5F5013E85A: from=<>, size=7622, nrcpt=1 (queue active) Oct 18 17:30:07 SERVER01 postfix/error[43116]: 5F5013E85A: to=<miguel_flores_san...@hotmail.com>, relay=none, delay=0.03, delays=0/0.02/0/0, dsn=5.0.0, status=bounced (No Such User Here) Oct 18 17:30:07 SERVER01 postfix/qmgr[35700]: 5F5013E85A: removed Existe a way to postfix use another transport method to send bounce messages? or I can do it only with "before queue"? Thanks
