Rocco Scappatura wrote: > Hello, > > When I send a message to an inexistent email address and the receiving > MTA is down, like the following example: > > av4 mail 16:46:22 postfix/smtp postfix/smtp[27440]: > 11BD7750296: to=<abcd...@destdomain.tld>, relay=none, delay=10, > delays=0.03/0/10/0, dsn=4.4.1, status=deferred (connect to > mx1.destdomain.tld[xxx.yyy.zzz.111]: Connection timed out) > > I don't get any notification about the status of delivery :-(. > > I don't think that this is normal. Anyway I don't understand if I'm > wrong something in my Postfix configuration, or is the receiving part > that is missconfigured.. Could somebody help me? > > rocsca > Postfix queues mail up to maximal_queue_lifetime (default: 5d). To receive notice of deferred mail, set delay_warning_time (see http://www.postfix.org/postconf.5.html#delay_warning_time )
To check DNS at receipt time, add reject_unknown_recipient_domain before permit_mynetworks in smtpd_recipient_restrictions. (NOTE: if DNS/network fails, all messages could be rejected. Setup a local DNS caching server to help prevent this) Brian
