I have 10 e-mails to send. The addresses look good but I get two errors.

Sometimes they will all send but one will come back undeliverable. So I find
the URL is good but the name is bad.

Then with another group of 10 I hit 'SEND' and is says an address is
immediately rejected. It may or may not tell me which is bad. The message is
removed from the Outbox. Did I send the other 9? What is wrong with the
address?

What does the 'Tools' . 'Check names' do? Does it just check against the
address book or does it check the validity of the addresses against internet
URLs?

Double L