[Cialug] Qwest subtly filtering port 25

[David Champion]

Just use port 587, and it should work for you.

http://www.ietf.org/rfc/rfc2476.txt

-dc

On Tue, May 31, 2011 at 3:10 PM, Matthew Nuzum <newz at bearfruit.org> wrote:

> This is an interesting move. Presumably this is because more and more
> _residential_ users are switching to a web-based mail system like hotmail
> and gmail. Leaving the bulk of the smtp traffic to be spam sending malware.
>
> Does this service effectively prevent the use of a native smtp client or
> does it just prevent the client from using other smtp servers besides
> Qwest's? I would guess that qwest would allow users to continue using the
> qwest mail server. However the problem I've always run into is that if
> you're using a mobile device then you can't send mail unless you're at home,
> on the ISPs network.
>
> A few years ago Verizon's residential DSL service in Florida had a
> different policy. They declared all smtp traffic to be for businesses and
> residential users weren't allowed to make SMTP connections to any server
> except theirs unless you upgraded to the business DSL package. Do you think
> this is the motivation of Qwest?
>
>
> On Fri, May 27, 2011 at 4:18 PM, Tim Perdue <cialug at perdue.net> wrote:
>
>> Not sure if anyone else ran into this, but it had me vexed all week. I
>> have used thunderbird for years from home to relay off an outside server and
>> it just quit working and starting giving an error about SMTP timeout.
>>
>> Turns out Qwest has done some sort of subtle blocking of port 25 that
>> causes SMTP to timeout, although the port appears to be open (you can telnet
>> to it).
>>
>> http://mikedopp.com/2011/bold-move-from-qwest-to-block-port-25-traffic/
>>
>> A call to tech support got them to drop the filtering within a few minutes
>> and my email works again.
>> _______________________________________________
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>>
>
>
>
> --
> Matthew Nuzum
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>
> "Opportunity is missed by most people because it is dressed in overalls and
> looks like work." -Thomas Edison
>
>
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