How to install your email signature in Spark Mail on iOS Sebastien Barrau December 12, 2016 14:32 Updated You can download Spark for free on the Apple App store. Related articles How to install your email signature in Outlook for iOS How do I add a email signature to Outlook 2003-2016 ? How do I add an email signature in Apple Mail on macOS? How do I add an email signature in Outlook 2016 for Mac? How to add a calendar button to my signature? Comments 0 comments Please sign in to leave a comment.