IceWarp v8 -
IceWarp Mail Server is capable of allowing communication with other Instant Messaging services such as ICQ, AOL, MSN & Yahoo. It is necessary to set the Instant Messaging service of IceWarp Mail Server to activate these modules and also set the user's Instant Messaging client to use these services as well.
HOWTO
It is possible to use services such as Yahoo, ICQ, etc.
1. Create an DNS A record for the service
Each service has to have its own DNS A record pointing to the server where IceWarp Instant Messaging server is running. e.g. icq.yourdomain.com pointing to your server.
2. Enable the modules on IceWarp Mail Server
Click Instant Messaging menu node and go to Services tab:

You can edit the IMServices.dat file there and add the modules. You can edit the file either via graphic interface (recommended - click Add... button) or directly as text file (only for advanced users - click Edit File... button). To add the ICQ module for example, click Add... button and fill in following information:

Of course, use your own service you defined in step 1 in Service option. Then click OK and restart the Instant Messaging service in System -> Services. Now users can use the ICQ module in their PSI client. To create another types of service such as MSN, Yahoo or AOL, change the Type and Module options. The Module option has to include appropriate dynamic library that can be found in <IceWarp>\modules\ folder.
3. Set the user's PSI to use the modules
Users can now use the ICQ module after the changes are made above. Whole process of this is here.
KB2007022014
updated 17.7.2007 by LukasP