On Sun, 24 Jan 2010 14:00:21 +0100, J.D. Bronson <[email protected]>
wrote:
I have noticed (at times) that sometimes email gets greylisted
when the user doesn't exist in my system. The mail ultimately get's
rejected, but I cant figure out why it's greylisting when it's invalid
to begin with? Greylisting, to me..should be the last resort..
I have this way up near the top of main.cf:
# REJECTING MAIL FOR UNKNOWN LOCAL USERS
local_recipient_maps = proxy:unix:passwd.byname $alias_maps
# ADDRESS REWRITING
alias_maps = $default_database_type:/etc/postfix/aliases
alias_database = $default_database_type:/etc/postfix/aliases
and then the typical stuff:
smtpd_recipient_restrictions =
permit_mynetworks,
reject_non_fqdn_sender,
reject_non_fqdn_recipient,
reject_unknown_sender_domain,
reject_unknown_recipient_domain,
reject_unauth_destination,
reject_invalid_hostname,
reject_non_fqdn_hostname,
reject_unknown_client,
reject_unauth_pipelining,
check_policy_service inet:127.0.0.1:10023
You need to tell Postfix when to lookup the recipient address or else that will happen
after all the other checks, i.e. after a client has passed greylisting. Just add the
"reject_unlisted_recipient" check somewhere before your greylisting service.
http://www.postfix.org/postconf.5.html#reject_unlisted_recipient
