Trying to e-mail a group of people using a Group list that I've used for several years I've got a message
"The Address Book could not locate an e-mail client that it could invoke. The Address Book uses the Simple MAPI protocol to send e-mail. If your e-mail client provides an option to let it handle Simple MAPI calls please turn on the option from the e-mail client and try again."
I've only got a blueyonder address and for mail this is set to POP3 and any available connection.
Who is the e-mail client -if it's me where do I find the option to turn it on?