On Thursday, August 25, 2016 at 4:20:05 AM UTC-5, John T. Haggerty wrote:
> I have the following issue (seems to be common although my details seem to
> differ):
>
> 1. I recently registered a new domain as WWW.whatever.org or whatever.
>
> 2. Postfix gets installed.
>
> 3. "Internet site " is enabled fqdn added.
>
> 4. Email cannot be sent out to my Gmail address since it magically "times
> out" when contacting the servers (even though telnetting to mine and Gmail's
> works fine at port 25)
>
> 5. In theory thus should mean that they aren't blocking 25, and it should
> work.
>
> 6. In the core wiki for Postfix I have the MX record of my server updated
> from the registrar to mail.whatever.org (pita since it's dynamic and not
> static).
>
> 7. I want to avoid using gmail's smtp and comcast's servers since I'd love to
> host this on my own.
>
> How can this be accomplished in Debian (not Ubuntu, or something else)? (I
> get irritated at Ubuntu specific explanations {which usually don't work}
> getting all the search results)
>
> Any help would be appreciated as I spent ~3 days of work and wiping the
> entire OS in case I went wrong somewhere.
from what i have read in the past it's comcast(cable providers in general) that
have their ports closed for people trying to run mail servers on home accounts,
business accounts can have them.
you could try to have your dynamic hostname provider send your incoming mail to
a different port and then just configure your postfix to listen there. this
might also work for your outgoing, yet not sure.
check with comcast blocking what ports. sometimes they will block 80(http)
also.
good luck.
