That's OK glad to be of help.
I have Rapport, but its not currently running. So I can experiment. (And yes I do think this is a bug, but I think it can probably be worked around. Fix hopefully in 2.7 release version, but this is taking a long time to release! I'm not a Comodo member of staff, so I have no exact knowledge).
I think what may work is using a batch file to:
1) killing the CAS32 instance that runs in the context of Rapport
2) launch CAS32 in the context of explorer, or of cmd.exe
3) then launch your email progam (if you want it automatically launched)
Alternatively, and possibly more neatly, one could launch Rapport in the same way as EasyVPN, starting the services, then rapport, from a batch file. But being security software this could be complex.
What appears to happen is that CAS32 launches in the context of mail-enabled applications, or services. Probably to ensure it can monitor them if required. When it launches in the context of applications it can close itself. When it launches in the context of services it cannot have a UI and cannot close itself (definition of a service - no UI, unless specifically enabled). Probably mail enabled services were a rarity when CAS was designed.
MY guess is Rapport has a facility to send logs or alerts by email? (Incidently I have had a few difficulties running rapport with CIS - high CPU when Rapport is launched - if CIS is in very high security mode - basically the programs are doing similar things and so probably fight over resources sometimes).
II just need to experiment a bit to see what is neatest.