You can start Sybmail with xp_startmail and no parameters (default configuration), but only in the following situations:
The Sybmail user account exists and the Start mail session parameter was configured to 1 when Adaptive Server was started, or
The Sybmail user account exists, and you enter the following command to automatically start Sybmail:
sp_configure "start mail session", 1
In both of these situations, do not restart XP Server before issuing the command to start Sybmail with its default configuration. Once you restart XP Server, it drops the default settings.