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?
> 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  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
>> through some sort of lame proxy that connects you to your intended
>> 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
More information about the NANOG