In Winapi.MAPI there is the InitMapi method called before a lot of operations. I have traced into that method from TSendMail.Execute. The method tries to read some registry keys but fails.   I have checked another MAPI implementation i have access to, the one in madExcept. That exact registry check can be found there to, but it's commented out (!).   I have been googling but there's so much noise!   Is it a VCL (Vcl.ExtActns/Winapi.MAPI units) bug?   TIA,   /Dany