exim troubles - HELO

So I go to subscribe to the slrn-user mailing list ... it sends me a confirmation email ... I reply to it and get the following complaint from exim: This message was created automatically by mail delivery software (Exim). A message that you sent could not be delivered to one or more of its recipie

exim troubles - HELO

So I go to subscribe to the slrn-user mailing list ... it sends me a confirmation email ... I reply to it and get the following complaint from exim: This message was created automatically by mail delivery software (Exim). A message that you sent could not be delivered to one or more of its reci