"571 sorry, reached maximum number of recipients for one session (#5.7.1 - chkuser) "

Good Evening -

 

I"ve received the noted error messge a couple times, but I cannot find any information about what it means.  Does it mean the message was not delivered to all recipients of the email?  Only some of the recipients did not receive the email?  And is there a setting I can change to increase the allowable number of recipients for any given email?

 

Thanks for any help/advice!

 

Paul

 

 

Full Error Message:

 

Category: Email Errors

Date & Time,Risk,Activity,Status,Recommended Action

2012-08-30 20:58:32,High,"571 sorry, reached maximum number of recipients for one session (#5.7.1 - chkuser)  ",Error,No Action Required