The limit you are talking about protects against large volume senders overwhelming the shared resources of our service and ensures emails are not all sent out at once for automated systems. Can you please tell us more about the problems this causes to the software that queueing and retries are not able to handle?Rob commented
This is a dumb a$& limit when Outlook offers itself a mail merge function. Running the mail merge with over 30 separate email addresses usually causes problems with the 30 messages per minute limitation!!
Come on Microsoft!