>relay_recipient_maps = hash:/etc/postfix/relay_recipients ok
>2) If I'm using permit_mx_backup on my IMgate, is it strictly necessary >that each and every domain with mx backup also have an entries in >relay_recipients? in to_relay_recipients.map: @mxdomain.tld ok ... excepts the domain from recipient_map checking. >Reason being that we do backup for some domains that I do not have and >cannot easily get a list of valid users (e.g. remote MTA is basically a >client's unadministered Exchange box). reject_unverified_recipient could run after check_recipient_maps. I assume the bulk of your recipients are known, so the bulk of rejects would get stopped by check_recipient_maps. the backup mx domains would then get protected with reject_unverified_recipient. Len
