Relay host for messages leaving the local internet domain & port

Is there any way to specify port number for the relay host for messages leaving the local internet domain.

Our ISP requires authentication on their relay on port 25 (which can not be used by Domino) but provides a relay without authentication on port 250

I have tried:

relay.myisp.com:250

relay.myisp.com 250”

whithout success.

Any help will be appreciated,

J R

Subject: Relay host for messages leaving the local internet domain & port

Have you tried using square brackets, i.e., [123.456.789.001:250]

Subject: RE: Relay host for messages leaving the local internet domain & port

I confirm that I tried it and this way works