Re: Does anyone know how Verizon's outbound, external mail (port 587) is going to work?

["Raw, Randy" <rawr () MORE NET>]

Port 587 is used for authenticated SMTP. We use this for a hosted mail
service we run and it works just fine. If service providers are still
allowing unencrypted POP access to their mail server this may be the only
way to move to authentication of the users without going to fully encrypted
POP (which is better for obvious reasons).

Randy Raw, CISSP
MOREnet Manager, Network Security
3212 LeMone Industrial Blvd
Columbia, MO 65201
573.882.0749
573.884.7699 fax
http://www.more.net/security

Remember...security is EVERYONE's business.
Register for the monthly MOREnet Security Webcasts at
http://www.more.net/content/web-seminar-schedule

> -----Original Message-----
> From: The EDUCAUSE Security Constituent Group Listserv
> [mailto:SECURITY () LISTSERV EDUCAUSE EDU] On Behalf Of Peter Charbonneau
> Sent: Thursday, September 24, 2009 7:17 AM
> To: SECURITY () LISTSERV EDUCAUSE EDU
> Subject: [SECURITY] Does anyone know how Verizon's outbound, external mail
> (port 587) is going to work?
>
> Good morning,
>
>    I just read Verizon's "letter to the community" about blocking
> outbound port 25 in order to decrease SPAM egressing their network.
>
> hxxp colon slash slash www dot verizon dot net slash port25
>
>
>    I am wondering exactly how this is going to work.  Do we punch
> holes in our firewalls to allow tcp port 587 inbound to our mail
> networks, or is Verizon going to port translate destination port 587
> IN their network to port 25 as it leaves?  I have tried to talk to
> Verizon tech support, but I either get "What?!?" or "It's all
> explained in the document".  When I ask to talk to a supervisor, they
> are unavailable.
>
>    Does anyone here know?
>
> PeteC
>
>
> Peter Charbonneau
> Sr. Network and Systems Administrator
> Williams College
> (413) 597-3408 (office)
> (413) 822-2922 (cell)
> OIT will NEVER ask for your password!

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