Anti-spam SMTP mods

[Jonathan Hutchins]

On Tuesday, March 09, 2004 02:49 pm, Brian Densmore wrote:

> What do you mean you had to unblock RDNS per your ISP's policies?
 
It was that or hack sendmail to return a 5xx bounce code instead of a 4xx, and 
my sendmail book is in England.

They accept the mail for valid reasons of their own, I want it auto-forwarded 
to my server, and if I bounce it with a 4xx code it gets stuck in their 
queue.