[Bug 1480861] New: amavisd default conf conflicts with nmh (scan)

https://bugzilla.redhat.com/show_bug.cgi?id=1480861

            Bug ID: 1480861
           Summary: amavisd default conf conflicts with nmh (scan)
           Product: Fedora
           Version: 26
         Component: amavisd-new
          Severity: medium
          Assignee: j.orti.alcaine(a)gmail.com
          Reporter: jos(a)xos.nl
        QA Contact: extras-qa(a)fedoraproject.org
                CC: j.orti.alcaine(a)gmail.com,
                    perl-devel(a)lists.fedoraproject.org, steve(a)silug.org,
                    vanmeeuwen+fedora(a)kolabsys.com



Description of problem:

When besides amavisd-new also nmh is installed, the default amavisd.conf rule
for Avast antivirus lets amavisd discard *any* incoming mail with:

    Blocked INFECTED () {DiscardedInbound,Quarantined}

This is because /bin/scan is called, which is part of nmh (as /usr/bin/scan).

Version-Release number of selected component (if applicable):

Any I know of.  I found the problem using EPEL 7 on CentOS 7, but the
amavisd-new and nmh packages conflict everywhere the same way.

Solution:

Comment out the this line in /etc/amavisd/amavisd.conf:

    ['avast! Antivirus', '/bin/scan', '{}', [0], [1], qr/\t(.+)/m
],

Because the use of the Avast virusscanner is probably not very common, it would
IMHO be a good idea to comment out this conflicting rule by default.  It costed
me quite some time to find out why all my mails were discarded.

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