Canary allows you to include a custom signature with each outgoing message.
- Open Canary.
- At the upper-left corner of the screen, tap the Hamburger icon.
- In the upper-right corner of the screen, tap the Settings icon.
- Scroll to the composing section.
- Tap Signatures.
- Enter a plain-text signature. (HTML is not supported at this time)
- You can also enter signatures per account.