Your host is probably behind a Cisco PIX firewall
with fixup protocol smtp 25 enabled.
J.
> -----Original Message-----
> From: Sebastien Monassa [mailto:[EMAIL PROTECTED]]
> Sent: Tuesday, June 19, 2001 2:54 PM
> To: [EMAIL PROTECTED]
> Subject: Strange SMTPd behaviour
>
>
> I could not find this problem in the FAQ or in
> the mailing list:
>
> SMTPD behaves differently from the inside network
> and from the internet.
>
> INSIDE:
>
> $ telnet mail.netsecurity.fr 25
> Trying 172.16.3.4...
> Connected to nss0501510sr.netsecurity.fr.
> Escape character is '^]'.
> 220 nss0501510sr.netsecurity.fr ESMTP
> HELO world
> 250 nss0501510sr.netsecurity.fr
> VRFY [EMAIL PROTECTED]
> 252 send some mail, i'll try my best
>
> INTERNET:
>
> # telnet mail.netsecurity.fr 25
> Trying 194.206.221.216...
> Connected to nss0501510sr.netsecurity.fr.
> Escape character is '^]'.
> 220 ***0*0***0***********************
> HELO world
> 250 nss0501510sr.netsecurity.fr
> VRFY [EMAIL PROTECTED]
> 502 unimplemented (#5.5.1)
>
> I guess the problem comes from the host being
> masqueraded, but I can't find out what to do to
> get it right.
>
> Thanks,
>
> Sebastien Monassa
>
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