I hope this is not too confusing. I am not new to OSX, but I finally decided to use the Mail app for the first time. Setup was easy and I have been on it for about a month. I have the following accounts on it: Microsoft Exchange Account Gmail Account #1 Gmail Account #2 Yahoo Account #1 Yahoo Account #2 Today I sent an email to ~30 recipients from Gmail account #1. The email shows up in my sent folder as being sent from Gmail account #1. But, when people started replying, it came to Gmail account #2. I verified with people I sent it to that it came from Gmail account #2. Any ideas what the problem could be?