[Mimedefang] filter-relay, rejection on bogus helo

[Bryan Stansell]

On Wed, Jan 07, 2004 at 09:44:23AM -0700, Lucas Albers wrote:
> if ($helo =~ /^(\w*)$/){ }
> 
> Anyone see any problem with my previously mentioned helo host check
> regex?

if you really want things that don't have a '.', i'd use

if ($helo !~ /\./) {}

if someone used 'HELO me!', your check wouldn't match...any
non-alphanumeric characters (besides '_') look the same to your regex,
so there are many non-'.' characters you could use to bypass the check.

Bryan