More frequently, it is a limit placed on the recipient's server. Hotmail used to be notorious for that.
>>> Michael Loftis <[log in to unmask]> 1/7/2010 1:07 PM >>>
It is a setting on the SMTP server. You have to either change the setting
in the SMTP server, or, you need to change the maximum in your Listserv
(MAXBSMTP)