NAME

       Mail::Milter::Module::MailDomainDotMX - milter to reject mail whose sender domain
       publishes a null MX record

SYNOPSIS

           use Mail::Milter::Module::MailDomainDotMX;

           my $milter = new Mail::Milter::Module::MailDomainDotMX;

           my $milter2 = &MailDomainDotMX; # convenience

           $milter2->set_message('Mail from %M domain invalid (has dot-MX record)');

DESCRIPTION

       This milter module rejects any mail from a sender's domain (in the MAIL FROM part of the
       SMTP transaction, not in the From: header) if that domain publishes a "null", or "dot" MX
       record.  Such a record looks like the following in DNS:

           example.com. IN MX 0 .

       This lookup requires the Net::DNS module to be installed in order to fetch the MX record.

       An extra check as to whether the MX is valid is not (yet) done here.  It is currently
       assumed that the MTA does rudimentary checking for the presence of a valid MX or A record
       on the sending domain.

METHODS

           new()

           Creates a MailDomainDotMX object.  There are no arguments to configure this module, as
           it is a fixed check.

           ignore_tempfail(FLAG)

           If FLAG is 0 (the default), a DNS lookup which fails the underlying DNS query will
           cause the milter to return a temporary failure result (SMFIS_TEMPFAIL).

           If FLAG is 1, a temporary DNS failure will be treated as if the lookup resulted in an
           empty record set (SMFIS_CONTINUE).

           This method returns a reference to the object itself, allowing this method call to be
           chained.

           set_message(MESSAGE)

           Sets the message used when rejecting messages.  This string may contain the substring
           %M, which will be replaced by the matching e-mail address.

           This method returns a reference to the object itself, allowing this method call to be
           chained.

AUTHOR

       Todd Vierling, <tv@duh.org> <tv@pobox.com>

SEE ALSO

       Mail::Milter::Object

POD ERRORS

       Hey! The above document had some coding errors, which are explained below:

       Around line 82:
           You can't have =items (as at line 94) unless the first thing after the =over is an
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