Questions about exploited SMTP relay

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hello,

i'm using smartermail on windows server 2008.

changed smtp relay "nobody" "only local users" , in last 2 days had large number of outgoing spam messages sent server (close 6.000).

has happened in past, , setting smtp relay "nobody" has fixed issue.

however, means have use smtp authentication every single website want send emails.

have following questions:

1. if relay set "only local users", how possible send emails domains not on server?
2. if use "nobody" smtp relay, safe lower number of seconds smtp authentication? default 120 seconds, way long.
3. ideas on how these emails sent? smtp relay still "only local users" , emails sent other domains (e.g. @refund.co.uk spam domain think).
4. can please point me decent source can learn more this?

thank you!

on sat, 7 feb 2015 11:21:10 +0000, batric batric wrote:

i'm using smartermail on windows server 2008.

you're asking 3rd party mail server not supported by
microsoft. try posting questions here:

http://portal.smartertools.com/community/root.aspx

paul adare - fim cm mvp
use of language: impossible sharpen pencil a
blunt ax. equally vain try ten blunt axes instead.
-- dijkstra



Windows Server  >  Security



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