From: Wietse Venema (wietseporcupine.org)
Date: Thu May 01 2003 - 07:39:19 CDT

• Messages sorted by: [ date ] [ thread ] [ subject ] [ author ]

Olivier Robert:
[ Charset ISO-8859-1 unsupported, converting... ]
> On Thursday 01 May 2003 01:52, Wietse Venema wrote:
> > Spoken in my best possible Franglais: tcpdump est votre ami.
> > See the DEBUG_README file.
>
> I just got confirmation that port 25 is blocked by my ISP. Thanks Bob.
>
> So I configured postfix to listen to port 9025 as found on the list archive,
> but this does not help as the MTAs (outside my LAN) will try to reach
> mail.le-caillon.net (my MX record) on port 25.
>
> A test on zoneedit.com (my DNS provider):
> http://www.zoneedit.com/smtp.html?server=mail.le-caillon.net&fromemail=robby%40le-caillon.net&toemail=robby%40le-caillon.net&smtptest=Begin+Test
> shows:
> ERROR: Error connecting to host mail.le-caillon.net.:25
>
> So, 25 is blocked, 9025 is not seen. I guess I can forget my own mail server.
> Or is there a solution I don't know of?

All solutions would involve a machine whose port 25 is accessible.

Moving the primary MX to another machine (perhaps on a virtual IP
address)...

Socksifying Postfix smtpd and using a socks proxy server on another
machine (perhaps on a virtual IP address)...

Using a firewall-level port forwarder on another machine...

Changing network provider.

        Wietse

• Messages sorted by: [ date ] [ thread ] [ subject ] [ author ]