Since upgrade to Yosemite, whenever I send an Email, the receiver sees it as coming from my wife only in the "From" column regardless of which signature I use. How do I change this?

Question

I recently upgraded to Yosemite.
When I send an Email, the receiver sees that it comes from my wife in their "from" column
We have separatee signatures that I can chose from and our Email account is identified with both of our names.
How do I change this so that when I send something, the receiver knows it is from me and not from my wife.

Answer 1

It may be that you have more than one outgoing mail account, and you're sending from the wrong one. From the Mail menu bar, select
          Mail ▹ Preferences...
The Mail preference dialog opens. Select the Composing tab from the row of icons at the top. From the menu labeled
          Send new messages from:
choose
          Account of selected mailbox
Note that this setting may have no effect if you start a new message while a VIP or smart mailbox is selected in the mailbox list. Those are saved searches, not actual mailboxes.
If the problem remains, select the Accounts tab in the preference dialog, then select the affected account in the list on the left.
In the Account Information pane, select the correct server in the menu labeled
          Outgoing Mail Server (SMTP)
If there's only one server in the menu, select
          Edit SMTP Server List...
and add a new server with the correct settings. If you're not sure how to do that, try the Mail Settings Lookup.
Another possibility is that the wrong card in your address book is selected as yours. Select your card in the Contacts application. Then select
          Card ▹ Make This My Card
from the menu bar.