[Dovecot] Possible pigeonhole dealing with negative numerical values
Using dovecot 2.2.9 and pigeonhole 0.4.2
The system is a Xen VM running Arch Linux x86_64, presently up to date, on an XFS filesystem in an LVM2 partition. After recently updating my mail server, I found that a sieve rule I had which would check X-Spam-Score for a value over a certain number, in my case 2.5. In my most recent update, negative values would trip the rule.
Here's the rule in question:
# rule:[Spam Filter Subject] if anyof (header :contains "Subject" "[SPAM]", header :value "gt" :comparator "i;as cii-numeric" "X-Spam-Score" "2.5") { fileinto "Spam Box"; stop; }
I have a successful work-around by checking the numerical value and also insuring that the header doesn't contain a '-', and things work as they should. Possible the bug could be in my Sieve interface, which is a RoundCube plugin. Otherwise things are working great.
If there's anything I can add, please let me know. Thanks!
-Sam
dovecot -n output:
# 2.2.9: /etc/dovecot/dovecot.conf # OS: Linux 3.12.4-1-ARCH x86_64 xfs auth_cache_size = 512 k auth_cache_ttl = 10 mins auth_mechanisms = plain login auth_verbose = yes default_internal_user = mailstore first_valid_gid = 50 first_valid_uid = 50 hostname = tacomatelematics.com last_valid_gid = 50 last_valid_uid = 50 lda_mailbox_autocreate = yes mail_gid = 50 mail_location = maildir:/var/spool/mail/%d/%n/Maildir/ mail_privileged_group = postfix mail_uid = 50 managesieve_notify_capability = mailto managesieve_sieve_capability = fileinto reject envelope encoded-character vacation subaddress comparator-i;ascii-numeric relational regex imap4flags copy include variables body enotify environment mailbox date ihave namespace { inbox = yes location = prefix = separator = . type = private } passdb { args = /etc/dovecot/dovecot-sql.conf.ext driver = sql } plugin { sieve = ~/.dovecot.sieve sieve_dir = ~/sieve } postmaster_address = postmaster@tacomatelematics.com protocols = imap pop3 lmtp sieve service auth { unix_listener /var/spool/postfix/private/auth { group = postfix mode = 0666 user = postfix } unix_listener auth-master { group = mailstore mode = 01130 user = mailstore } unix_listener auth-userdb { group = mailstore mode = 0600 user = mailstore } } service managesieve-login { inet_listener sieve { port = 4190 } inet_listener sieve_deprecated { port = 2000 } } ssl_cert = </etc/certificate.pem ssl_key = </etc/certificate.pem userdb { args = /etc/dovecot/dovecot-sql.conf.ext driver = sql } protocol lmtp { mail_plugins = " sieve" } protocol lda { mail_plugins = " sieve" }
On 12/14/2013 7:05 PM, Sam Mulvey wrote:
Using dovecot 2.2.9 and pigeonhole 0.4.2
The system is a Xen VM running Arch Linux x86_64, presently up to date, on an XFS filesystem in an LVM2 partition. After recently updating my mail server, I found that a sieve rule I had which would check X-Spam-Score for a value over a certain number, in my case 2.5. In my most recent update, negative values would trip the rule.
Here's the rule in question:
# rule:[Spam Filter Subject] if anyof (header :contains "Subject" "[SPAM]", header :value "gt" :comparator "i;as cii-numeric" "X-Spam-Score" "2.5") { fileinto "Spam Box"; stop; }
http://tools.ietf.org/html/rfc5231#section-3 :
Note: the "i;ascii-numeric" comparator does not support negative numbers.
I have a successful work-around by checking the numerical value and also insuring that the header doesn't contain a '-', and things work as they should. Possible the bug could be in my Sieve interface, which is a RoundCube plugin. Otherwise things are working great.
If there's anything I can add, please let me know. Thanks!
Checking for a minus is a good workaround.
However, there is also a special set of nice Sieve extensions for the purpose of checking spam score: http://tools.ietf.org/html/rfc5235 . It requires some configuration at the server (http://wiki2.dovecot.org/Pigeonhole/Sieve/Extensions/SpamtestVirustest), so it may not always be available. Of course, Roundcube also needs to support it for it to be useful, but I am not sure whether it can normally use those extensions. A quick peek at the sources of the managesieve plugin shows that it probably doesn't support the spamtest extension:
https://github.com/roundcube/roundcubemail/blob/master/plugins/managesieve/l...
I also took a quick peek at the source code of JohnDoh's sieverules plugin for RoundCube, and it looks like that one does have support for it. Note that that is a different (more feature-rich) Sieve plugin than the managesieve plugin included in the RoundCube distribution itself.
Regards,
Stephan.
participants (2)
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Sam Mulvey
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Stephan Bosch