Can the auto-convert back to Notes address be disabled when sending a message to an internet address?
 
Resolving the problem: 
 
This can be disabled by adding the following ini parameter to the Notes client’s notes.ini:
 
TYPEDOWN_LEAVE_AS_SMTP=1
 
When sending a message to an internet address, this parameter will prevent Lotus Notes from converting back to a Notes formatted address if found in an address book.