The Protonmail Logo 2 icon shows an outlined envelope with a folded M-shaped interior and a vertical right-side panel. Drawn in the line style on a 24px grid with a 1px stroke so it stays crisp and evenly spaced. Use it for Proton Mail branding, email apps, secure messaging interfaces, inboxes, and contact links. It belongs to Logos Line - Free set in the Logos family.
