Outlook for Mac HTML email signature installation guide

Good news — the current Outlook for Mac supports HTML email signatures directly, with no third-party plugin needed. It uses a WebKit rendering engine (the same as Safari), so pasting a rendered Mirosign signature works well.

1Create and download your signature
1. Design and save your signature in Mirosign (an active subscription is required to download).
2. Click Download HTML and open the file in Chrome, Edge or Firefox.
3. Click the signature, press Cmd + A to select it all, then Cmd + C to copy.
2Open Outlook signature settings
1. In the menu bar, click Outlook → Settings (or press Cmd + ,), then choose Signatures.
2. Click the + button and name the signature Mirosign signature.
3Paste and set as default
1. Click into the editing area and paste with Cmd + V. If a paste menu appears, choose Keep Source Formatting so the layout is preserved.
2. Under Choose default signature, pick your account and set Mirosign signature for new messages (and replies/forwards if you wish).
3. Close settings and click New Email to check your signature.
Note: If colleagues on Windows Outlook say the layout looks broken, it’s because the classic Windows renderer is stricter. Mirosign signatures use table-based HTML designed to work across both.

Design your email signature