From: Jeremy D. May (jeremyrootservices.net)
Date: Sun Apr 18 2004 - 23:57:24 CDT

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to me it sounds like your isp is blocking traffic on port 25.

--j

> Hi,
>
> I am trying to configure postfix but am running into a few problems.
>
> I can send mail internally from different users on my machine but I can't
> send or recieve mail from outside.
>
> My domain is garrystanway.co.uk My internet connection is an adsl link
> ppp0.
> I use dnsexit to provide a dynamic dns service that works fine.
>
> If I run nmap from the localhost port 25 is open. If I do the same from
> a remote machine, it appears as filtered. I also can't telnet the port
> (not
> suprising really).
>
> Here is the bits of my main.cf that I think may need changing.
>
> myhostname = garrystanway.co.uk
> mydomain = co.uk
> myorigin = $myhostname
> inet_interfaces = all
>
>
> I think the failure to send mail out of the server may be because my
> reveres
> DNS does not link back to my domain. But I can understand why port 25 is
> not open to the outside world. Any suggestions would be greatly
> appreciated.
>
> Regards
>
> Garry Stanway
>
>
>
>
>

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