For years I have sent an email to all teams in my cricket club by simply adding each separate group list to the 'cc' or 'bcc' list and pressing send, thus sending the same mail to 100+ people simultaneously, no problem. Suddenly the system says I am trying to send it to 'too many recipients'. I even had to split some of the group lists in to two separate group lists because it seems that the maximum number of people I can send one email to is now about 20 people. This is a problem especially that sometimes players would comment on the email and wish to include everybody in the club, so would use the 'reply all' function. Now they can only reply to those on the same email list as them, which sometimes isn't even all of their own team... Club leaders are on more than one of the team lists, so some people now have to receive the same email in their inbox up to 5 times due to this problem. There were no changes at all made to anything else with my system: same server, same computer, same emails, same everything. It just happened one day to the next.