my $milter = new Mail::Milter::Module::HeloUnqualified([EXCEPT]);
my $milter2 = &HeloUnqualified([EXCEPT]); # convenience
DESCRIPTIONThis milter module rejects any domain name that HELOs without a dot, and which is not an IPv4/IPv6 literal. Whether or not the HELO value corresponds to the connecting host is not checked by this module.
If the EXCEPT argument is supplied, it should be a regex enclosed in a string which will be exempted from this check. Commonly, '^localhost' is excepted.