Let's say we have one e-mail account test@example.com. If we want to store e-mail from this e-mail address, we should configure the MTA (Postfix in this example) to receive this e-mail, and forward it to our IMAP server.
If it forwards it to the IMAP server, the IMAP server can say "OK, received", or something like "NO, I don't know that user". In the latter case, the MTA often tries to send an Undelivered Mail Returned to Sender e-mail to the sender-address (which does not have to be the actual sender). This causes backscatter.
So, we should tell the MTA which e-mails should be forwarded, and which e-mails should not.
Possibilities
[ ] Using Unix sockets (socketmap_table) - I want to support at least this
Let's say we have one e-mail account
test@example.com. If we want to store e-mail from this e-mail address, we should configure the MTA (Postfix in this example) to receive this e-mail, and forward it to our IMAP server.If it forwards it to the IMAP server, the IMAP server can say "OK, received", or something like "NO, I don't know that user". In the latter case, the MTA often tries to send an
Undelivered Mail Returned to Sendere-mail to the sender-address (which does not have to be the actual sender). This causes backscatter.So, we should tell the MTA which e-mails should be forwarded, and which e-mails should not.
Possibilities
... more?
This issue is there for discussion / new possibilities to implement.