Help needed

A G-Mail account I use on behalf of a charity, has several hundred addresses in its data base. This morning when I tried to do a mass mailing it failed and warned me that a or some of the addresses were "wrongly" entered. How do I find out which one's are needing changing? Do I have to "troll" through every address to find it/they?

Oh and f**k knows how it happened because it worked fine last night and no new additions made to the data base.

Posted By: mike_the_sphinx, Jul 2, 07:39:40