Does Signal work for email? Signal does not provide an email service. We recommend looking into the LEAP Encryption Access Project and Mailpile. Both of these organizations are working hard to make encrypted email easier to use. Related articles Can I use Signal for work? Can I send SMS/MMS with Signal? What do I do if my phone is lost or stolen? Is Signal available on other phones or operating systems? How do I know if my message was delivered or read?