Outgoing SMTP Servers

Owen DeLong owen at delong.com
Tue Oct 25 10:17:28 CDT 2011


On Oct 25, 2011, at 3:29 AM, <Valdis.Kletnieks at vt.edu> wrote:

> On Tue, 25 Oct 2011 02:35:31 PDT, Owen DeLong said:
> 
>> If they are using someone else's mail server for outbound, how, exactly do you control
>> whether or not they use AUTH in the process?
> 
> 1) You don't even really *care* if they do or not, because...
> 
> 2) if some other site is running with an un-AUTHed open port 587, the miscreants will
> find it and abuse it just like any other open mail relay. The community will
> deal with it quick enough so you don't have to. And at that point, it's the
> open mail relay's IP that ends up on the block lists, not your mail relay's IP.
> 
But that applies to port 25 also, so, I'm not understanding the difference.

> Other people running open port 587s tends to be quite self-correcting.
> 

At this point, so do open port 25s.

Owen




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