Re: Port 25 blocked ?

Actually Brian, many ISPs are blocking port 25 to anything other than their mail server. Part of what brought this about is people running servers on residential accounts, rather than commercial accounts

SBC and Comcast are both doing some blocking of port 25

--
Cris Hanna [SBS-MVP]
-------------------------------------------------
Microsoft MVPs
Independent Experts (MVPs do not work for MS)
Real World Answers
---------------------------------------------------------
Please do not contact me directly regarding issues

"Brian Cryer" <brianc@xxxxxxxxxxxxxxxxxxxxxxxxx> wrote in message news:Oc7fxCt%23HHA.536@xxxxxxxxxxxxxxxxxxxxxxx
"Andy" <Andy@xxxxxxxxxxxxxxxxxxxxxxxxx> wrote in message
news:19625386-1327-4DFE-AF8A-FEF1E907151E@xxxxxxxxxxxxxxxx
>I have a dynamic IP with local cable ISP, i use ddns from a free service
> provider. Have a registered domain
>
> Is it possible that my i ISP block port 25 for outgoing smtp traffic.
> incoming works ok but mail keep stalled in Exchange Queued

Its very unlikely that your ISP would have blocked port 25 outbound, because
this would block ALL outgoing email traffic (regardless of email client or
system). If you want to test then try:

telnet 217.12.11.64 25

note the space between the ip address and the 25. This connects to the yahoo
mail server. So should give you a line like:
220 mta130.mail.ukl.yahoo.com ESMTP YSmtp service ready
type "quit" to close.

If that works then your ISP isn't blocking port 25 outbound. Blocking port
25 inbound is more common, but you said that incoming works okay.

I think its more likely that the problem lies elsewhere. Are you using
Exchange? Are your emails stuck in outbound queues or do you get
non-delivery messages?
--
Brian Cryer
www.cryer.co.uk/brian

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