Compose and send emails

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Proton Mail allows you to set a time for encrypted messages to expire (automatically delete themselves). Learn how.

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All messages in Proton Mail show a lock icon that tells you their encryption status. In this article, we explain what these locks mean.

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Here's how to set up an Out of Office or Vacation automatic response to all or some of your emails in Proton Mail using our auto reply feature.

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If you want to recall an email after you click Send in Proton Mail, you can use the Undo Send feature to retrieve your message.

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In addition to formatting text in the composer window using the formatting ribbon, you can specify a default font and font size.

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Learn how to use PGP so you can encrypt your email communications when communicating with contacts who don't use Proton Mail.

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Proton Mail lets you schedule emails to be sent at a later time. Just follow these steps.

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Proton Mail's attachment reminders prevent you from accidentally sending emails to your recipient without including the mentioned attachments.

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Learn more about email encryption and the easiest way to send a secure email using Proton Mail.

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If you're on Proton Mail, learn how non-Proton Mail users can receive password-protected messages from you and reply securely.

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Read about how Proton Mail handles the attachments, and what happens when you send and receive attachments form Proton Mail and non-Proton Mail contacts

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You can attach multiple files to an email in Proton Mail by clicking the Attachment button or dragging and dropping a file into the email composer.

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Learn why your attachments on Proton Mail appear larger in your email than on your device.