One solution found for GroupWise

[gustavmuenster]

Hello

We use here Novell GroupWise GWIA Servers.

It is not possible to change the SMTP Port to 26 on Groupwise.

So, we have found, that we can use 2 IP addresses on Proxmox.

first IP: for incoming traffic
second IP: for outgoing traffic

Then, we make a Prerouting on Proxmox, that all traffic to port 25 from the second IP is send to the port 26 from the first IP.

iptables -t nat -A PREROUTING -t nat -p tcp -d X.X.X.X --dport 25 -j DNAT --to X.X.X.X:26;

Regards.

Gustav.

 

[tom]

Hello

We use here Novell GroupWise GWIA Servers.

It is not possible to change the SMTP Port to 26 on Groupwise.

hi,
if you do not want to change the SMTP port on your email server to port 26 or if your environment does not support this (ie. exchange 5.5), you can configure Proxmox to use port 25 for outgoing and 26 for incoming mails.

for details, see chapter "7.2 Configuration for Exchange 5.5" in the Adminguide.