contactsiosmobile-mail
iOS: 12.2
In the iOS Mail app, if the sender or recipient of an email has more than one email address associated with it, how can I tell which specific email address was used? For example, if I send myself an email from my personal account to my work account, since they're both associated to the same contact, I can't figure out how to tell who the recipient actually was. I have both Short Names and Prefer Nicknames turned off in the Contacts preference.
I believe the solution to the problem is to prevent Mail.app from tracking Previous Recipients. To permanently disable this feature you have to use this terminal command:
defaults write com.apple.mail SuppressAddressHistory -bool true
Once you've done that, make sure you delete your Previous Recipients history. To do this, in Mail.app, open up Previous Recipients window (Windows > Previous Recipients), select all existing records present there and hit "Remove From List".
From now on, your Address Book will not get updated by Mail.app.
Note, that this will change the way address autocompletion works in Mail.app. From now on only addresses present in your Address Book (and optionally in LDAP if configured) will be auto-completed. Previous Recipients which are not present in your Address Book will not be auto-completed.
The whole problem seems to be quite unusual for Apple standards. A hidden and undocumented sync feature, with no obvious way to disable.
Go to settings on the iPhone. Go to the 'Messages' settings. And select Receive At.
See what it says there. It should be your phone number not Apple ID or email.
If you have a Apple email listed. You can remove it by.
Clicking the 'Apple ID youremail@me.com'
You will get a popup which lets sign out thus removing the mac email address.
Best Answer
*In older iOS versions the correct email/phone number had a different color but in new versions it has a "recent" tag above the correct email/phone number.
See below: