Block spam and user lists

[Jayz]

Hello, I have Proxmox MG 5.0 and 3 questions:
1. How I can block spam by text phrase from body text?
2. I have global and users white lists. If I block spam in global list for all users and 1 user add email address in own white list, this user can't receive this mail. How I can change priority? I want that users white/black lists have more priority than global.
3. How to block email/subject with utf8/ Cyrillic symbols?
Thanks

 

[Stoiko Ivanov]

Hello, I have Proxmox MG 5.0 and 3 questions:

Please consider updating to the latest versions (5.2), since quite a few bugfixes and other improvements were made (`pmgversion -v` should show you which exact versions are installed)

1. How I can block spam by text phrase from body text?

This usually leads to a large number of unexpected false positives and in most cases where users wanted to implement this it was due to a misconfiguration, and fixing that removed the need for blocking based on trigger-words - please check your mail.log for results from pmg-smtp-filter and explain which mails should get blocked but aren't blocked.
That being said - you can create a custom spamassassin rule to block on a certain text in the body and include that in pmg (check out the pmg-admin-guide (section 4.8)
https://www.proxmox.com/images/download/pmg/docs/pmg-admin-guide.pdf and https://wiki.apache.org/spamassassin/WritingRules).

2. I have global and users white lists. If I block spam in global list for all users and 1 user add email address in own white list, this user can't receive this mail. How I can change priority? I want that users white/black lists have more priority than global.

This is not possible in a straight-forward manner - the rationale behind is that the admin-provided black/whitelist has a higher priority and actually blocks mails, the user fed black-whitelist is there for users to prevent mails from entering the quarantine or forcing them there.

3. How to block email/subject with utf8/ Cyrillic symbols?

See the point about false positives in the body above. If you want to block such mails you can add a rule with a 'match field' object matching the subject and block mails if it contains any cyrillic character. Additionally the following links could help:
* http://sa-russian.narod.ru/no_russian.html
* https://spamassassin.apache.org/full/3.4.x/doc/Mail_SpamAssassin_Conf.html
* http://spamassassin.1065346.n5.nabble.com/Cyrillic-spam-td47920.html

Hope this helps!

 

[ejmerkel]

I am trying to implement item #3 above. I am trying to create a What Object using the Match Field for the Subject to detect any Cyrillic characters. The Regex I am using to detect Cyrillic characters is [\u0401\u0451\u0410-\u044f] per https://stackoverflow.com/questions...cyrillic-characters-with-a-regular-expression

I am somewhat confused on what should be in the Value Field vs the Test String. See the screen shot here. http://prntscr.com/nvlv1o

 

[Stoiko Ivanov]

* The value is the regular expression that will be used by the rule system
* the Test String is for you to try if the regular expression works as expected - you just enter a sample string and click on test

hope this helps!

 

[ejmerkel]

When I try to enter that information I get the following error: http://prntscr.com/nvujgy

Parameter verification failed. (400) field: value does not match the regex pattern

Is the regex not formatted correctly?

 

[Kapellan]

Когда я пытаюсь ввести эту информацию, я получаю следующую ошибку: http://prntscr.com/nvujgy

Ошибка проверки параметра. Поле (400): значение не соответствует шаблону регулярного выражения

Регулярное выражение отформатировано неправильно?

Как я понял решения данной проблемы так и нет?