Digital Signature on email is a service that allows you to apply a signature to your outgoing emails and attachments, allowing you to keep a record of your documents. The recipient can easily reply or send them to another recipient, without needing to share the document itself. It's a must-have extension to check your emails and attachments, as well as files sent by other apps and even the web, for signs of tampering. To do so, all you have to do is to install this free software to your browser, select your attachment and signature method, and insert your PIN. You will then be ready to compose your email and attach your signature.