Outlook 2003 - Echange server error 0x8004011D

[Silvan Becker]

After upgrading from Outlook 2002 to Outlook 2003 I am
getting an 0x8004011D "The server is not available" error
when I try to send/receive mail.

The error only occurs when working from home where I
connect to our office exchange server via a notebook ->
Windows XP -> software VPN (Tunix) -> WiFi -> ADSL
configuration. Using the same configuration with Outlook
2002 worked fine before.

When I am working in our office and connect via the LAN
everything works still fine like before.

The following lines are the VPN configuration
=============================================
tunnelserver,195.193.213.177
tunnelport,899

tcp,127.0.0.12,25,10.31.2.12,25
tcp,127.0.0.12,110,10.31.2.12,110
#tcp,127.0.0.12,135,10.31.2.12,135 Remarked for Win2000
tcp,127.0.0.11,139,10.31.2.11,139
tcp,127.0.0.12,139,10.31.2.12,139
tcp,127.0.0.50,139,10.31.2.50,139
tcp,127.0.0.12,143,10.31.2.12,143
tcp,127.0.0.12,389,10.31.2.12,389
tcp,127.0.0.12,3460,10.31.2.12,3460
tcp,127.0.0.12,3461,10.31.2.12,3461
ftp,127.0.0.12,21,10.31.2.70,21
=============================================

Does anyone has a working hypothesis about what could be
the cause of this error message? Thanx!

Silvan