I have a mail system based on postfix amavisd spamassassin clamav. I wanted to e-mail that come from the outside were filtered before queue. I tried to use smtpd_proxy_filter but encountered a problem.
When I use the content_filter, postfix sends mail to amavis after using virtual_alias_maps, so sends to the target mailbox. When I use smtpd_proxy_filter, postfix sends mail to amavis with the same RCPT TO he got from the client. Theoretically, this is no problem but for me it is because I amavisie settings retrieved from mysql to each recipient separately. Theoretically, this is no problem but for me it is, because amavis settings are retrieved from mysql to each recipient separately. I also have aliases that direct into two or more mailboxes and each of them can have different settings in amavisie. Now, when using smtpd_proxy_filter send mail to alias "A" which directs to the mailbox "B" and "C" amavis gets RCPT TO "A" and trying to find a setting for "A". It is impossible to replace "A" by example "B" because it can have different settings than the "C" Using a content_filter when send mail to alias "A" which directs to the mailbox "B" and "C" amavis gets RCPT TO "B" RCPT TO "C" and everything is fine. I thought it was impossible to smtpd_proxy_filter sent mails to amavis after using virtual_alias_maps because cleanup process perform virtual_alias_maps, but smtpd process needs to know about all aliases, because how else he could rejected emails to non-existent mailboxes. So I have a question. Is it possible to set postfix to send mail to amavis before queue but after perform virtual_alias_maps or another aliases map? -- Best regards! Piotr Rotter
