postfix header_checks - regex spanning multiple lines

Question

I would like to create a spam filter that spans multiple lines in headers. This is my /etc/postfix/header_checks file:

/^From:.*name[0-9]+@.+[\r\n]+To:.*name@domain\.com/  REJECT

It's a valid regex, but doesn't work, because header_checks applies the filters to one line at a time. How can I check for multiple headers at the same time? Matching against the whole raw headers block would work just fine, but I can't find an option for that.

`but I can't find an option for that.` ---> Yes your desired option doesn't exist in Postfix. You need **external** content filter to achieve your goal. — masegaloeh, Mar 10 '15 at 08:57
@masegaloeh can you suggest some simple external filter that could do this? — blade, Mar 10 '15 at 12:51
You can start by visiting the [postfix addon page](http://www.postfix.org/addon.html) — masegaloeh, Mar 10 '15 at 12:57

score -1 · Answer 1 · answered Mar 09 '15 at 15:18

-1

Maybe an option to this case is put a conditional in the header field:

/^(From|To):.*name[0-9]+@.*/  REJECT

answered Mar 09 '15 at 15:18

Rodrigo B Brasil

59
2

That wouldn't work, as both the conditions need to be true at the same time – blade Mar 10 '15 at 08:22

postfix header_checks - regex spanning multiple lines

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