On Sat, 30 May 2009, Sthu Deus wrote: > Good day. > > > If You use an email relay service, how do You protect it: VMs, iptables > connections rate limit, ... ? > > Personally, I have a problem with email sending authorization - how I can > separate the users that have not their boxes on our service and therefore I > can > ban their trials to pick up a password - I can not reduce it even to the local > net IPs bt iptables - as port 25 is used for not only for sending our own > users > but for receiving it for the local users - as I understand.
Consider using port 587 for submission. Allow only authenticated sessions on port 587, and port 25 use only for comunication with other MTAs. see RFC 2746, 3.1 -- Regards, Paweł Zuzelski -- To UNSUBSCRIBE, email to [email protected] with a subject of "unsubscribe". Trouble? Contact [email protected]
