Port 25 - Blacklash

Tue Apr 26 18:17:55 UTC 2005

The fact that most people did not complain is not likely due to the  
fact that they were not annoyed by the change, but rather it's easier  
to simply get around it than it is to bother complaining to network  
admins.

For example, about 2 months ago, comcast decided to block outgoing  
port 25 from my entire neighborhood. I called comcast, and while  
sitting on hold I had the idea to setup a ssh tunnel to a machine at  
work and viola problem solved before anyone from comcast even  
answered the phone.

Adam

On Apr 26, 2005, at 2:03 PM, Eric Gauthier wrote:

>
> Paul,
>
>
>> For any educational institutions on this list - what has been the  
>> impact on
>> your mail services once your ISP started blocking port 25 - what  
>> if any was
>> the backlash - and how difficult was it to provide alternatives ... 
>> 587,465
>> etc ...
>>
>
> Our ISPs don't filter our traffic.  If they consistently did, they  
> probably
> wouldn't be our ISPs for long.
>
> OTOH, the question that you didn't ask was if educational institutions
> themselves are blocking port 25 from their users :)
>
> In our case, yes we are.  We only allow SMTP connections from our dorm
> subnets to the campus mail servers.  Personally, I thought there
> was going to be a huge backlash from our community when we put this  
> in about
> a year ago.  Of the 12,000 students that this affected, I believe  
> two have
> inquired about it but didn't really have an issue with it.
>
> Eric :)
>
>
> !DSPAM:426e832d147596632912183!
>
>