On 26/09/14 14:10, Klaipedaville on Google wrote:
Hey! You are right Alex! Many thanks for pointing me to head over to the right direction! It was a clash on rules for some reason. Now, I was also right that these two systems could not be used together because the rules declared in different systems to perform the same action (REJECT) cause the error I was having! The following rule in default.sieve: require ["reject"]; # rule: Reject on "x-spam-flag" header if header :contains "X-Spam-Flag" "YES" { reject "No spamming allowed here."; stop; } and the following Postfix's regexp header_check rules on the subject field: /^Subject:.**{5}SPAM*{5}/ REJECT No spammers allowed here. /^Subject:.*\*\*\*\*\*SPAM\*\*\*\*\*/ REJECT No spammers allowed. /\s**{5}SPAM*{5}/ REJECT No spamming hullababballos allowed.
I think it may be this one above. From the postfix manuals:
"By default, matching is case-insensitive, and newlines are not treated as special characters. The behavior is controlled by flags, which are toggled by appending one or more of the following characters after the pattern: *i* (default: on) Toggles the case sensitivity flag. By default, matching is case insensitive."
And it looks like * needs escaping there too (if you're trying to match exactly 5 asterisks, you should probably do "\*{5}" not just *{5}.
/^Subject:(.*)SPAM/ REJECT Spam is not allowed. DISCARD. were causing the Dovecot Sieve rejection bounce not to go through. The rules blocked the spam all right but rejection was turned into discard for some reason. Now the question is how do I find out which regular expressions will be in conflict with default.sieve scripting rules?
That's just about learning Posix Regex syntax.
Default.sieve is set to block spam on the X-Spam-Flag header and header_checks is set to block spam on the subject field. I am still clueless why didn't these two "cooperate"? Was it just because they were "told" to perform the same action as per my previous guess?
I'm almost 100% sure that that regex also matched the bounce from your sieve rules. There is no mysterious interaction between header_checks and sieve rules, it's just your pattern was too liberal in the former.
But the target to perform this same action on was different... Any more ideas anyone? Alex? Many thanks in advance for any input!
I think if you tune that header_checks file correctly you should have no more issues.
Thanks
Alex
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