Hi, I'm Mr.med. Welcome to JustAnswer. I'm reviewing your question now, and will post back with your reply ASAP.
Please use the Online Email Extractor to remove the ''bad emails" Click on http://emailx.discoveryvip.com/
then copy and paste all your email in the box, select new line or comma from the list then click Extract.
Let me know the results
Ok, hope it works out
Please let me open your question to other experts
If you are using Outlook, you should be able to do an Alt+K to verify all of the senders in your e-mail before it's sent. It will pop up with a correction window for every e-mail address that is not correctly entered.
Are these e-mail address added to a template e-mail or do you pull them from something else?