Oops. Apologies. I misread your post as you talked about SSL later on.
Anyway, it can also be used with TLS. My example app includes this code to manage it:
Code:
'code for STARTTLS
If txtPort = 587 Then
.Item("http://schemas.microsoft.com/cdo/configuration/sendtls").Value = True
End If
Having just read Phillip Stiefel's article at codekabinett.com, I see he uses the same sendtls code line
BTW - it is NOT necessary to use the ancient CDO reference from 2000 mentioned in that article as CDO support has been built into Access for at least 15 years
I'll worry about OAUTH as & when I need to do so