Well, I'll start with my standard response to this topic:

SMTP != POP3
SMTP <> POP3
SMTP .ne. POP3

Now that that's out of the way, you don't let "inbound" POP access, you're
allowing access to your mail server via POP3. Personally, I think that's not
appropriate for most organizations, but for some it might be. It certainly
isn't for ours, and I tend to disable POP3 on Exchange from the start.

To address the attachments issue via POP, that's why my attachment filtering
list is deployed both on our gateway mail servers, which manage both inbound
and outbound mail as well as on the Exchange servers. With this scheme, all
combinations of sender-recipient pairs are covered under the same attachment
limitations.

Roger
--------------------------------------------------------------
Roger D. Seielstad - MTS MCSE MS-MVP
Sr. Systems Administrator
Inovis Inc.


> -----Original Message-----
> From: Matt Plahtinsky [mailto:[EMAIL PROTECTED] 
> Sent: Thursday, June 12, 2003 1:52 PM
> To: Exchange Discussions
> Subject: POP = Bad? -- SMTP = Good?
> 
> 
> List,
> 
> This might be more appropriate for a firewall/security list 
> but it involves email and I don't belong to one of those yet 
> so I'll post my question here.  I'm curious as to how many of 
> your companies allow internal clients to access POP mail 
> externally.  The reason I'm asking is because I see POP mail 
> as security risk.  Let me explain.  Our firewall strips all 
> but a few attachments from our incoming SMTP email. With POP 
> however attachments cannot be striped leaving a hole for new 
> virus that aren't detectable yet by our virus software.  I'm 
> going to try to talk management into letting me block POP.  
> Is blocking incoming POP something other company do?  Is 
> there some other way to secure incoming POP mail?
> 
> Matt
> 
> 
> 
> 
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