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How to create a mail signature using HTML in Apple Mail

How to create a mail signature using HTML in Apple Mail
3. May 2023 markbarner
Sådan laver du en mailsignatur ved brug af HTML i Apple Mail

The disadvantage of not using HTML images in an email signature is that the recipient will constantly see images attached to your emails and will think you have attached something, but it’s just your logo. Some emails with attachments can also easily end up in spam. The downside of HTML signatures is that they can also end up in spam. Therefore, it is important that if you send from an email address called “(yourname)” that you also upload your logo on the website e.g. For example, my logo is in my email signature at and therefore my emails do not end up in spam because I also send from – i.e. the same domain name on the email as the image file is located on.

Do you need help creating or designing an HTML Email Signature?

We are ready to assist you, whether you need design expertise. We collaborate with Barner Design, who are designers and programmers, ensuring you receive a creative solution.

Alternatively, we can easily create a good and efficient HTML signature. So, reach out to us at MacGeni. Book us today.


How to add an HTML signature to Apple Mail: step by step (with screenshots)

  1. Open Apple Mail on your Mac and click on the Mail menu. From the drop-down menu, select “Preferences.”
    Navigate to Settings in Apple Mail
  2. Within “Settings”, click on the “Signatures” tab to see a list of all your signatures. To add a new signature, click the “+” button.

    Review Signatures section of Settings and click the "+" button

  3. Add placeholder text to your signature. This text will be replaced by your HTML signature, so you don’t have to worry about the content.

    Add placeholder text to your signature

  4. Drag the signature to your email account in the left column and select your signature under “Select signature.”

  5. Next, close the preferences window and quit Apple Mail. It is important to close Apple Mail completely. When you exit, your signature will be saved in your system. This is a placeholder until you implement the HTML signature by following the steps below.

  6. To install your HTML email signature, select “Go > Go to folder” in the Finder menu.

  7. In the window, enter “~/Library/Mail” and click the “Go” button.

    Navigate to the "~/Library/Mail" folder

  8. In the new window that appears, click on the folder with the highest number after the letter “V.” This folder contains the latest version.

    Select the folder with the highest number

  9. choose “MailData.”
    Select the MailData folder
  10. choose “Signatures.”
    Select the Signatures folder
  11. In the Signatures folders, you will see a list of signature files. Find the file you just edited by examining the “Modified” date and open the most recent file ending with “.mailsignature.”
    Select the .mailsignatures file
  12. Right-click on the signature file and select “Open with > TextEdit.”

  13. While a TextEdit window is open with the .mailsignature file, open your pre-made HTML signature file in another TextEdit window.

    Open both HTML files

  14. Select the entire content of your pre-made HTML signature (CMD + A) and copy the data (CMD + C). Select the content starting with “<body…” in your .mailsignature file and replace it with your pre-made HTML data (CMD+V). Do not delete the data above “<body…”

    Copy and paste the premade signature into the .mailsignature file

  15. Your .mailsignature file should look something like this after replacing the text.

    Mailsignature file with updated HTML code

  16. Save the file and close TextEdit.

    Save this in the TextEdit application

  17. Right-click on the email signature you just edited and select “Get details.”

    Right click to select the Get Info

  18. Check the checkbox labeled “Locked” to prevent Apple Mail from overriding your new HTML signature. Important: Do not omit this step or Apple Mail will override your signature.

    Lock the .mailsignature file

  19. Confirm that the signature looks as you expect. Open Apple Mail and navigate back to Signatures to do this.
    Double check that the signature appears as you'd like


Congratulations! You have now successfully added an HTML signature to Apple Mail.

Source for images and translated guide:

Do you want html signature on your iphone and ipad?

  1. First, you need to set up the email signature on your Mac, as I’ve shown above.
  2. Next, send an email to yourself with the new email signature.
    On your iPhone, copy the new email signature in the email you sent to yourself.
  3. Go to Settings – Mail – Signatures and click where you want to paste it and click again with your finger and select “paste”.
  4. Now your email signature looks a bit weird, so shake your phone… Yes, that’s how you undo something on your phone.
  5. It will ask you if you want to undo “formatting” and you select yes.
  6. Now your email signature should be formatted to HTML so it looks like the one you sent to yourself by email.

Need help creating or designing a Mail Signature in HTML?

We’re here to help you if you need either design, because we work with, who are designers and programmers, so you can get a creative solution.

Alternatively, we can easily create a good and efficient simple HTML signature. Then contact us at MacGeni. Book us today.

Regards Mark


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