Argh — thanks for pointing that out. I had wrongly assumed that clamav-milter supported GNU regex extensions. That explains it.

Dan

On 21 Dec 2025, at 19:59, Newcomer01 via clamav-users <[email protected]> wrote:


it seems the basic POSIX do not support matching groups: https://en.wikibooks.org/wiki/Regular_Expressions/POSIX_Basic_Regular_Expressions
so your REGEX From:^(user1|user2|user3)@domain.tld$ will never work

Von / From: Daniel Colquitt Via Clamav-Users
An / To: Newcomer01
CC / CC: Daniel Colquitt
Gesendet / Sent: Sonntag, Dezember 21, 2025 um 20:13 (at 08:13 PM) +0100
Betreff / Subject: Re: [clamav-users] clamav-milter whitelist
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