This is my feature request...
I want to add reject_sender_login_mismatch to smtpd_sender_restrictions. This is very useful thing... with this users can't fake source e-mail address (user can't send e-mail contained "mail from: <firstname.lastname@example.org>" which is not belonging to user).
Everything is fine, when I do: [user email] = [user account] (I don't need any MySQL data
-> simple SELECT '%s' :P).
The problem is, when I want add user aliases. When user has alias, sometimes he/she want to write using alias source, eg. account is: email@example.com
, alias is: firstname.lastname@example.org
. User log to SMTP by account login, and in "mail from:" he/she write: email@example.com
Someone who designed mail_forwarding do several bad things!
1. common data with 'alias','aliasdomain','forward','catchall'
( ok I can do 'WHERE', but type is not indexed! )
2. use text in destination! (aaaaaa!!!)
3. and don't use index in destination
This is not good, more... this is performance headshot :/
I think You should repair this
Destination e-mails should be in other records, and also should be indexed.
Postfix understand when query gives 2 or more rows.
Types should be indexed too.
By the way... I switched Courier to Dovecot in ispconfig3 and it works fine
If someone are interested in config files... msg to priv.