[Bug 192229] New: [patch] mail/milter-regex:Postfix cannot connect to Milter service

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https://bugs.freebsd.org/bugzilla/show_bug.cgi?id=192229

            Bug ID: 192229
           Summary: [patch] mail/milter-regex:Postfix cannot connect to
                    Milter service
           Product: Ports Tree
           Version: Latest
          Hardware: Any
                OS: Any
            Status: Needs Triage
          Severity: Affects Some People
          Priority: ---
         Component: Individual Port(s)
          Assignee: freebsd-ports-bugs at FreeBSD.org
          Reporter: bug at mbfw.net

Created attachment 145110
  --> https://bugs.freebsd.org/bugzilla/attachment.cgi?id=145110&action=edit
Make /var/run/milter-regex/sock readable by postfix

On 10.0-STABLE with postfix 2.11.1_2,1, postfix logs "postfix/smtpd[24120]:
warning: connect to Milter service unix:/var/run/milter-regex/sock: Permission
denied"

Postfix runs as the user postfix, in the groups postfix and mail. So its smtpd
process is unable to read the sock file for milter-regex:

        % sudo ls -l /var/run/milter-regex/
        total 8
        -rw-rw----  1 mailnull  daemon  5 Jul 26 12:40 milter-regex.pid
        srw-------  1 mailnull  daemon  0 Jul 26 12:40 sock

The directory permissions (700) also prevent postfix from accessing the sock
file.

See attached patch for suggested fix (with thanks to neirbowj).

The patch has been tested and addresses the sock permission denied issue with
postfix. Since sendmail runs as mailnull, this patch only modifies group
ownership and permissions to add access for postfix, and should not prevent
sendmail from accessing sock. It is also consistent with guidance from postfix
that a milter not run as the postfix user.

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