How do I add my email signature to Polymail on iOS?
Polymail is available as a free download on the App Store.
Open your signature on htmlsig.com and click Open in New Tab.
Select and copy your signature to your clipboard.
Open Polymail and go to the Settings menu.
Under Accounts, tap the email address you want to add the signature to.
Find the Signature field below your name and email address, tap into it, and paste your copied signature.
Tap Save in the top-right corner.
Note: if you use an email alias, signatures for aliases can only be edited in Polymail's Web or Desktop app, not on iOS.