domain alias + reject_unverified_recipient
I am using alias domain on open source version 6 .
To stop bounce spam trafic I have to add
"reject_unverified_recipient" in file "postfix_recipient_restrictions.cf"
But after doing this we frequentelly get following message in mail clinets (Out Look Express)
" 450 <firstname.lastname@example.org>:Recipient address rejected: unverified address: Address verification in progress"
Is there any way to over come this problem. I searching forum from last 3 days but could not find any soloution.
Try unverified_sender_defer_code option
I think the problem you experienced might be affected by two options:
a) The order in which the different actions are listed in smtpd_recipient_restrictions seems to matter. I added the "reject_unverified_recipient" option last, just before the "permit" option.
b) The "unverified_sender_defer_code" option is set to "450" by default. Therefore, if a temporary error occurs during recipient verification, the server will send a temporary error to the client, resulting in the error message. By setting this option to "250", the server will accept the recipient address, if it cannot be verified right now. Thus, the server will only send an error to the client, if the address cannot be verified because of a permanent problem.
Please tell me, if this options work for you. I am currently evaluating ZCS Network Edition and for the tests I performed, it works. However, I would like to know, if it also works in other setups before possible moving our production system to ZCS.