I can't e-mail a picture from iphoto because a message comes on the screen and says it does not recognize my user name and pass word. How do you correct this?
Hello, are you doing this from iPhoto or what?
What happen if you just drag a picture to anew Mail?
Take a look at iPhoto Preferences>Accounts & make sure that information is correct. I also use the method that BDAqua suggested quite often.
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