Disable SMS and other messaging on Windows Mobile
If you want to lockdown a user of a Windows Mobile device to not send/receive SMS messages or eMails, you can use a blacklist. First enable Disallow policy on the device and then list all apps you dont like the user to run.
REGEDIT4 ;Enable blacklist of applications that should not run [HKEY_LOCAL_MACHINE\Security\Policies\Shell] "DisallowRun"=dword:1 ;Add entries to blacklist of applications that should not run [HKEY_CURRENT_USER\Software\Microsoft\Windows\CurrentVersion\Policies\Explorer\DisallowRun] "1"="tmail.exe" "2"="sms.dll" "3"="poutlook.exe" ;add more here as "3", "4", "5", etc.
tmail.exe, sms.dll and poutlook.exe are responsible for message handling on the device. If you disallow them, the user cannot start them anymore.