Apple mail auto cc's myself when I reply all after installing ML, how do I stop this annoyance?

I had this problem. I solved it by going to Preferences then the email account that had the problem. There's a drop down in the Account Information window (the default display once you click on your email account) titled Alias. Make sure the email address listed is your email address and not a .me or .icloud address or some other alias address. I had a .me alias. Once I eliminated that by selecting my actual email address everything was fixed.

I think I'm having an "a-ha!" moment thanks to doug38.

But it needs a bit of clarification: You need to edit your iCloud account.

Go to PREFERENCES.

Choose ACCOUNTS

Click on your iCLOUD account.

There is a dropdwon menu for Aliases- Choose CUSTOM.

Enter your preferred reply-from email address.

Note how that address should slide to the top of the account lists.

If Doug38 is right, that should do the trick!

I wish I knew! I reprted it to Apple and I suggest you also report it. If Apple gets enough comments about this flaw, they may fix it. To do this, open Mail and click on Mail, then click on Feedback.

You do realize that when you "reply to all" your email address is one of the original recipients don't you? What happens is that the sender's address is in the "To:" field and all others are in the "cc:" field. The setting you refer to is there to auto cc you when you send an email, but does not filter the list of email addresses when you "reply to all".

Same story! Takes me up to 1 hour a week to clean it since I reply tons of mail. Sent them a feedback.

Yes, but that's the problem, and it should be fixable so that it DOES filter it. On previous versions or when using POP mail, this annoying thing didn't automatically happen.