Open your HTML email signature file in TextEdit. You'll see the email signature's HTML code, press Cmd + A to select it all, then press Cmd + C to copy the selected HTML code.
Open Missive and at the bottom left of your screen click your name, then hover over Settings and select Signatures.
Click Create Signature. Enter a name for your email signature, then beneath the Content field, switch it from Rich Text to HTML. Click inside the content field and delete any text that appears, then press Cmd + V to paste your copied HTML code. A preview of your signature will now display in the bottom field. Click Create.
You'll now be taken to an Alias page. Assign the signature to the email alias of your choosing, then Save. Compose an email and your email signature will now automatically insert when writing a new email in Missive on macOS.
Create professional email signatures that make a lasting impression. Easy to customize, always looks perfect across all email clients.
Missive Email Signatures