I use postfix as for local delivery as for relay to an mx exchange. I
want to use greylisting and DNSBL. This ar my restrictions:

smtpd_data_restrictions =
reject_multi_bounce

smtpd_sender_restrictions =
reject_non_fqdn_sender
reject_unknown_sender_domain

I've configured a postfixmailserver as an frontend of ms exchange so
postfix has got an transport "domain.tld smtp:[ip_of_msex]. Now I got
the request dor transport one special address to another host
"user@domain.tld smtp:[ip_of_special_host] - thats not the problem I
think. But: this special host is seldom online so I have to to
increase the queuel lifetime (or whatever - I dont know the right word
for) to one e.g. month. How to do that, please help.

regards

Ronny Seffner