[Dovecot] Writing "sieve" script

[Steffen Kaiser]

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On Tue, 23 Mar 2010, Jerry wrote:

> require ["fileinto"];
> if header :contains "X-Virus-Status" "Infected" {fileinto "SPAM"; stop;}
> elsif header :contains "X-SpamCop-Disposition" "Blocked" {fileinto "SPAM"; stop;}
> elsif address :contains "To" "user1 at domain.com" {fileinto "INBOX.user1";}
> elsif address :contains "To" "user2 at domain.com" {fileinto "INBOX.user2";}
> elsif address :contains "To" "user3 at domain.com" {fileinto "INBOX.user3";}
> # The rest goes into INBOX
> # The default is "implicit keep", we do it here explicitly
> else {keep;}
>
> This works fine unless user1, user2 and or user3 are all included in
> the same e-mail address. It is rare; however, it does happen. In that
> case, a separate message for each recipient would be delivered to the
> first matching mailbox. The other recipients would not receive any traffic at all.

Is this a catch-all mail account so that a single account receives 
messages for user1, ...,& user3?

If so, you have a logical error in the program flow:

if user1 then
 	fileinto
else if user2 then
 	fileinto
else if ....
end if

when the first condition matches, the second will never tried.

hence:

if header :contains "X-Virus-Status" "Infected" {fileinto "SPAM"; stop;}
elsif header :contains "X-SpamCop-Disposition" "Blocked" {fileinto "SPAM"; stop;}
else {
 	if address :contains "To" "user1 at domain.com" {fileinto "INBOX.user1";}
 	if address :contains "To" "user2 at domain.com" {fileinto "INBOX.user2";}
 	if address :contains "To" "user3 at domain.com" {fileinto "INBOX.user3";}
 	# The rest goes into INBOX
}

if the implicit keep does not work, you need to add another "if", e.g.

 	if not address :contains "To" [ "user3 at domain.com", "user2 at domain.com","user1 at domain.com"] {
 		keep;
 	}

Regards,

- -- 
Steffen Kaiser
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