From: /dev/rob0 (rob0gmx.co.uk)
Date: Thu Feb 10 2005 - 11:50:20 CST

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Please don't top-post. Thank you.

On Thursday 10 February 2005 11:09, rf wrote:
> Thank you for the information, even if I can not understand who or
> what stop the connection between the telnet client and my mail
> server! (I'm sure about firewalls and routers config.)

You need to check on the router and firewall. That does, after all,
control what and how anything gets in from the outside.

> But, please let me know only another thing: who tell me "421 SMTP
> service not available....". Is it the telnet client?

Magnus answered this:
> That's not Postfix. Something is intercepting the connections so they
> never reach Postfix. Postfix logs all connections made.

Check your logs and you will see that it's not Postfix.

If people cannot reach your Postfix from the outside, your Postfix can
only be an internal server or a relay for internal hosts. It cannot be
an MX.
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