Provided by: opensmtpd-extras_5.7.1-1build1_i386 bug

NAME

     filter-regex — smtpd filter for regular expression filtering

SYNOPSIS

     filter-regex [-l limit] [file]

DESCRIPTION

     filter-regex is a filter for smtpd(8) which can be used to filter mails
     using regular expressions matching SMTP session parameters.

     The options are as follows:

     -l limit  Set the number of lines limit of filter-regex after which the
               regular expression processing is stopped and the mail is
               accepted.  The accepted values are within the range of 1 and
               UINT_MAX.

               The default limit value is 0 (unlimited).

     Depending if one of the regular expressions matches mails are either
     accepted or rejected with a SMTP 554 reply.  Non-matching mails are
     always accepted.

FILES

     /etc/mail/filter-regex.conf  Default filter-regex configuration file.

SEE ALSO

     filter-regex.conf(5), filter_api(3), smtpd.conf(5), smtpd(8),
     re_format(7), regex(3)

HISTORY

     The first version of filter-regex was written in 2015.

AUTHORS

     filter-regex was intially written by Armin Wolfermann
     ⟨armin@wolfermann.org⟩ and further improved by
     Joerg Jung ⟨jung@openbsd.org⟩.