Re: comcast, port 25, and postfix?

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On 5/14/2009 5:52 AM, Tom Horsley wrote:
> On Thu, 14 May 2009 08:40:07 +0200 (CEST)
> Johan Swensson wrote:
> 
>> Port 25 is also used for receiving mail.
>> My guess is your ISP blocked port 25 for incoming connections due to someone using your postfix for relaying spam. 
> 
> Nope, I don't have port 25 open on my router, I'm sure there can't
> be any incoming traffic. And since last night I've had a perl script
> monitoring my router's output log looking for port 25 activity
> and it hasn't seen any so far (except the one time I tried
> to connect to work just to make sure it showed up in the log).
> 
> More and more, I suspect comcast is just making stuff up
> to justify blocking port 25 (which is odd since they
> don't really need any justification :-).
> 


Comcast stopped using port 25 for their smtp and not uses port 587. And
they did say it was to do as suggested. To stop spam relays.

-- 


  David

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