In Apple Mail, there is functionality to add additional email addresses per email account. In G-Suite (and I would assume Office 365) you can set up email aliases and the additional email addresses in Apple mail associate with those aliases.

My issue is the need for a different email signature to be set by default for each email address, not account.

As you can see here I have multiple email addresses for this one account.

My email addresses in one email account

And here you can see that this account has two email signatures, but I can only set one of them for both addresses.

Email signatures

What options do I have to fix this?

  • Would you agree to use another software to answer your professionnal need?
    – dan
    Commented May 21, 2020 at 22:11
  • The Outlook mail client has the ability to have multiple email addresses regardless of the number of accounts or addresses. For instance, you can have a formal and informal signature for the same address and even another for people in the same domain (like at work).
    – Allan
    Commented May 22, 2020 at 1:24

1 Answer 1


Based on several hours of research and digging around in .plist and other files, I feel confident that there is NOT a way to do what you (and I) are looking for in the Apple Mail macOS app. Sorry.

Here's another answer that helps confirm this.

This would be a handy feature that couldn't possibly be very hard for Apple to implement based on how they have already designed a very flexible UI for assigning signatures to accounts, and the structure of the underlying .plist files seems conducive to the concept, too, if the aliases just had account-like IDs. Too bad.

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