Unable to send email from Mac Mail App to one specific email address (all emails to all other emails addresses are sent)
I found a easy way to result this trouble. that's will work for gmail account.
1-First you have to delete the account follow system preferences -> internet account-> select your gmail account in the left bar and delete it.
2-Open your mail app go to preferences and tap the + sign for add a account. Select gmail and login into the new windows that show up.
3- select the google account to the left bar of mail app and synchronize "google" by making a right click. that's it you will able to receive and send mail.