Is your ISP blocking outgoing port 25?

Patrick W. Gilmore patrick at ianai.net
Fri Jun 19 03:37:59 CDT 2009


Sent from my iPhone, please excuse any errors.


On Jun 19, 2009, at 8:53, Jeroen Wunnink <jeroen at easyhosting.nl> wrote:

> We just open port 2525 for customers from ISP's blocking official  
> SMTP ports so they can use their dedicated servers/domain mailservers.

Is there any reason you do not use port 587, SUBMIT?

-- TTFN,
patrick


> Lyndon Nerenberg wrote:
>> On Thu, 2009-06-18 at 16:14 -0400, Joe Provo wrote:
>>
>>> then you should be shifting your userbase to authenticated on the
>>> SUBMIT port [587] anyway...
>>>
>>
>> Except for those ISPs who choose to intercept port 587 as well.  
>> This is
>> a big problem with Rogers in Vancouver. They hijack port 587  
>> connections
>> through some sort of lame proxy that connects you to your intended  
>> host,
>> but strips the AUTH field out of the EHLO response from the remote
>> submission server ...
>>
>>
>>
>
> -- 
>
> Met vriendelijke groet,
>
> Jeroen Wunnink,
> EasyHosting B.V. Systeembeheerder
> systeembeheer at easyhosting.nl
>
> telefoon:+31 (035) 6285455              Postbus 48
> fax: +31 (035) 6838242                  3755 ZG Eemnes
>
> http://www.easyhosting.nl
> http://www.easycolocate.nl
>
>
>




More information about the NANOG mailing list