How to install your email signature in Polymail on iOS Sebastien Barrau April 20, 2018 18:58 Updated You can download Polymail for free on the App store. Related articles How to install your email signature in Outlook for iOS How do I add an email signature in Outlook 2016 for Mac? How do I add a email signature to Outlook 2003-2016 ? The text you typed is too long. Please shorten it and try to save it again. How to install your email signature in Spark Mail on iOS Comments 0 comments Please sign in to leave a comment.