We received the following error message when trying to send out a group email.  We have had this group for a couple of years and send out something 3-4 times per week with no problem.  This is the first time we have received this. 

Please use the following format for email addresses: *** Email address is removed for privacy ***. If you're using category names or nicknames, make sure you don't have any typos.

How do we get past this so we can continue to send out info emails to our church members?