Quote:
Originally posted by spruce
I just bounced a message off my fastmail.fm account and noticed that the bounce handler is something called Sieve.
|
This is Sieve:
http://www.faqs.org/rfcs/rfc3028.html.
Quote:
|
I was wondering whether this type of filter is or can be handled at the RCPT TO stage of the SMTP conversation.
|
No it can't. SMTP can not reject receipts to some recipients but not others. So policy in SMTP must be site-wide, not per user. Sieve rules are handled by the Cyrus LMTP daemon; LMTP knows how to handle per-recipient actions, so this is where Sieve kicks in.
Quote:
|
If this were the case, I would be able to give all my friends "special words" to add to plus addressing of my email, like "user+box@host" where box is the special word using plus addressing.
|
You can do this now with the 'secret word' feature in Preferences->Define Rules. It doesn't improve the load for FastMail.FM's server, but as I mentioned above that's not really possible because of how SMTP works.