OT: Comcast permanent block on port 25

fchan fchan at molsci.org
Fri Dec 19 22:38:26 UTC 2008


They are trying to block spam.
This is same for ATT DSL several years ago. At least ATT gave us an 
option to opt out of this via a form on their website. Check with 
Comcast if they have that option.
You can use port 587 as an alternate port for receiving receiving 
mail so check with your MTA to see if you can change from port 25  to 
587 or use both port 25 and port 587 at the same time.
I have both port 25  & 587 on my mail server just because some ISP 
block port 25 and my colleagues send mail from various locations and 
they have no control over the network.

Here are some links regarding port 587:
http://www.pcmag.com/article2/0,2817,1838667,00.asp
http://blog.deliverability.com/2008/06/does-sending-e.html

Frank

>Comcast, in their infinite wisdom, has begun to block all inbound 
>port 25 connections at my location.
>
>I collect several mailing lists at my home domain which I have 
>maintained for many years.
>
>Plus, it has always been nice to have an email box that I could run 
>my own spam filters on.
>
>Because MicroSoft has created such a huge mess with spambots and the 
>like, I have lost another privilege that not long ago was assumed, 
>and now falls into a business only category.
>
>I do not blame the consumers who are duped into buying computers 
>with a pre-installed OS.
>
>It is so VERY annoying that step by step, we lose individual 
>freedoms because of corporate greed and incompetence.
>
>Its somewhat like being in jail for something you did not do.  Or so 
>it seems to me.
>
>Sorry for the rant.
>
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