Email Validator

Check a list of prospects

One prospect per line. Columns: Prospect, Email 1, Email 2, Email 3 — separated by commas or tabs, so a block copied straight out of a spreadsheet works. Empty cells are fine. A plain list of addresses on their own still works too.
One address is enough. You do not need three. Put the prospect and a single address — exampleblog.com, editor@exampleblog.com — and the Validator judges that one address on its own, telling you whether it is real and whether mail to it will arrive. Two or three simply give it a choice to make between them.