How many of you see emails from mailer daemon stuck in your mail queue?
How many are for some non existent dfgsdgd@ user at your domains? (this I can fix do the mod below)
After spending days and days, the postfix users have told me that its the way plesk is handling spam that is causing 'backscatter'.
Bouncing spam instead of deleting it. These bounces then get stuck in the outgoing mailserver queue as they are all spam and undeliverable.
This makes anyone using plesk a source of backscatter and that is really BAD you can get blacklisted for doing this.
This needs to be addressed ASAP. Its something in 9 the way it handles mail has changed since the other versions.
The issue is you don't bounce SPAM - ever.
So far I have minimised it by rejecting spam for users that are NOT on the server by editing /etc/postfix/main.cf:
# REJECTING MAIL FOR UNKNOWN LOCAL USERS
local_recipient_maps = $virtual_mailbox_maps
#smtpd_sender_restrictions = check_sender_access hash:/var/spool/postfix/plesk/blacklists
smtpd_sender_restrictions = check_sender_access hash:/var/spool/postfix/plesk/blacklists, reject_non_fqdn_sender, reject_unauthenticated_sender_login_mismatch
Thanks!
David
How many are for some non existent dfgsdgd@ user at your domains? (this I can fix do the mod below)
After spending days and days, the postfix users have told me that its the way plesk is handling spam that is causing 'backscatter'.
Bouncing spam instead of deleting it. These bounces then get stuck in the outgoing mailserver queue as they are all spam and undeliverable.
This makes anyone using plesk a source of backscatter and that is really BAD you can get blacklisted for doing this.
This needs to be addressed ASAP. Its something in 9 the way it handles mail has changed since the other versions.
The issue is you don't bounce SPAM - ever.
So far I have minimised it by rejecting spam for users that are NOT on the server by editing /etc/postfix/main.cf:
# REJECTING MAIL FOR UNKNOWN LOCAL USERS
local_recipient_maps = $virtual_mailbox_maps
#smtpd_sender_restrictions = check_sender_access hash:/var/spool/postfix/plesk/blacklists
smtpd_sender_restrictions = check_sender_access hash:/var/spool/postfix/plesk/blacklists, reject_non_fqdn_sender, reject_unauthenticated_sender_login_mismatch
Thanks!
David