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.\"
.IX Title "Mail::Milter::Module::MailDomainDotMX 3pm"
.TH Mail::Milter::Module::MailDomainDotMX 3pm "2023-01-22" "perl v5.36.0" "User Contributed Perl Documentation"
.\" For nroff, turn off justification.  Always turn off hyphenation; it makes
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.nh
.SH "NAME"
Mail::Milter::Module::MailDomainDotMX \- milter to reject mail whose sender domain publishes a null MX record
.SH "SYNOPSIS"
.IX Header "SYNOPSIS"
.Vb 1
\&    use Mail::Milter::Module::MailDomainDotMX;
\&
\&    my $milter = new Mail::Milter::Module::MailDomainDotMX;
\&
\&    my $milter2 = &MailDomainDotMX; # convenience
\&
\&    $milter2\->set_message(\*(AqMail from %M domain invalid (has dot\-MX record)\*(Aq);
.Ve
.SH "DESCRIPTION"
.IX Header "DESCRIPTION"
This milter module rejects any mail from a sender's domain (in the \s-1MAIL FROM\s0 
part of the \s-1SMTP\s0 transaction, not in the From: header) if that domain 
publishes a \*(L"null\*(R", or \*(L"dot\*(R" \s-1MX\s0 record.  Such a record looks like the 
following in \s-1DNS:\s0
.PP
.Vb 1
\&    example.com. IN MX 0 .
.Ve
.PP
This lookup requires the Net::DNS module to be installed in order to fetch 
the \s-1MX\s0 record.
.PP
An extra check as to whether the \s-1MX\s0 is valid is not (yet) done here.  It is
currently assumed that the \s-1MTA\s0 does rudimentary checking for the presence of
a valid \s-1MX\s0 or A record on the sending domain.
.SH "METHODS"
.IX Header "METHODS"
.RS 4
\&\fBnew()\fR
.Sp
Creates a MailDomainDotMX object.  There are no arguments to configure this 
module, as it is a fixed check.
.Sp
ignore_tempfail(\s-1FLAG\s0)
.Sp
If \s-1FLAG\s0 is 0 (the default), a \s-1DNS\s0 lookup which fails the underlying \s-1DNS\s0
query will cause the milter to return a temporary failure result
(\s-1SMFIS_TEMPFAIL\s0).
.Sp
If \s-1FLAG\s0 is 1, a temporary \s-1DNS\s0 failure will be treated as if the lookup
resulted in an empty record set (\s-1SMFIS_CONTINUE\s0).
.Sp
This method returns a reference to the object itself, allowing this method
call to be chained.
.Sp
set_message(\s-1MESSAGE\s0)
.Sp
Sets the message used when rejecting messages.  This string may contain
the substring \f(CW%M\fR, which will be replaced by the matching e\-mail
address.
.Sp
This method returns a reference to the object itself, allowing this method
call to be chained.
.RE
.SH "AUTHOR"
.IX Header "AUTHOR"
Todd Vierling, <tv@duh.org> <tv@pobox.com>
.SH "SEE ALSO"
.IX Header "SEE ALSO"
Mail::Milter::Object
.SH "POD ERRORS"
.IX Header "POD ERRORS"
Hey! \fBThe above document had some coding errors, which are explained below:\fR
.IP "Around line 83:" 4
.IX Item "Around line 83:"
You can't have =items (as at line 95) unless the first thing after the =over is an =item