No. MAPI is just an interface for Windows. The mail server is still using the regular incoming/outgoing methods, so you can use the current Safeguard server method to send emails.
The only reason to use MAPI would be because you can program the outgoing license mails to be stored locally on Outlook or Groupwise. However, you can achieve the same thing by configuring the mail server to send a copy of all outgoing emails to an Outlook or Groupwise account.