In recent days I have been unable to send messages to Groups in my Contacts file.  I receive an Error message Server Response "452 too many recipients" Port 25. Secure SSL: No, Server Error: 452, Error number: Ox800CCC79."  The Group mailing lists I use have up to 120 recipents.  I have been told that Windows Mail and Windows Live Mail now restrict the number of recipients in a Group Mailing.   Is this correct? If so when was it introduced and what are the restrictions.

Until a few days ago I was happily sending group mailings without any proplems.