Multiple Gmail accounts in MacMail

I have tried to find a solution all over the place, and couldn't find one anywhere...I was able to solve the problem, but since this seemed to be a fairly commonly asked question, without a good solution, I wanted to post this. 🙂

My issue was that my wife and I both have separate Gmail accounts, but when she would use the Mac Mail program on our MBP, when she would send emails, it showed her name, but came from my Gmail account, and when people would respond to her emails, they would come to my email address.

No amount of Google searching turned up a good answer, and so I kept digging, and managed to stumble on this by myself...

The issue is that according to MacMail, you are using the same outgoing Gmail smtp server, so you need to differentiate the two.

Go to Mail > Preferences

In your accounts, click the drop down that has Outgoing Mail Server (SMTP), and click "Edit SMTP Server List...".

When that window comes up, you'll see two different entries for Gmail, with the same outbound SMTP. Click on them individually, and you'll see the different Gmail account credentials. Change the description of each (I changed mine to my and my wife's names, to easily identify which SMTP went with which mail account) and ensure that your Gmail credentials are accurate. Click OK.

Now, under each of the Gmail accounts, change the Outgoing Mail Server (SMTP) drop down to match each of your Gmail accounts, and click the "Use only this server" box.

That should fix your issue!

Nick