My Friend is facing a problem he is not able to send mails from outside for e.g yahoo.com his mx is natted on the firewall to my exchange server.
Sender gets a bounce back mail stating below: -
203.X.X.X does not like recipient.
Remote host said: 550 5.2.1 Mail from 209.X.X.X refused: spam site.
Giving up on 203.X.X.X.
Sorry but i dont know whether this forum should answer my querries which are actually of my friends.
But if you could it would be really helpful.
Thanks in advance.