How To Set Up HTML Email Signatures In Fastmail

Fastmail is a sophisticated email service which you can resell to your clients. Recently a client asked me to set up an HTML email signature with his logo. I send plain text emails so I didn’t know how to do this, and Fastmail’s otherwise good docs were silent on this. So here’s how:

• Go to Options → Signatures.
• Choose which signature to edit (top item of sidebar).
• Fill in Raw HTML signature box with your HTML snippet.
• Click Copy HTML to text button.
• Save signature.
• Click Make default signature if necessary.
• Go to Options → Account Preferences → Compose section.
• Set Default compose mode to Rich text (HTML).
• Set Signature for new to Before editing, above original.
• Set Signature for reply to Before editing, above original.
• Set HTML when responding to Always as HTML.