We have many users that create rather large Groups. Sometimes when sending to the Group they receive an error:

"Some addresses are undeliverable and have been crossed out. Would you like to go to the address book and resolve them?"

When you click "yes" to go to the address book, the Group name is crossed out. Not terribly helpful!

Are there any tricks to "validating" the addresses contained in the Group to determine which are in error? It appears that if you expand the list and attempt to send, you may find the addresses that cause the errors but I would hate to send a test message to the hundreds on the list by accident!

Any other ideas?

Thanks for all the assistance you can provide!