ProtonMail v3.15 Release Notes


With the latest ProtonMail update, you can now create Contact Groups and easily send bulk messages. You can also request and respond to read receipts, confirming the message has been received.

Contact Groups

With Contact Groups, you can add up to 100 email addresses to a group and easily message them from the Composer. To create a group, simply navigate to Contacts and choose the “Add contact group” option in the sidebar menu:

Each email address can belong to multiple groups. And for contacts with more than one email address, you can choose which address to add to which group.

Once you create a group, it will appear as a suggestion in the Composer when you start typing in the “To” field:

We also added the option to modify the group from within the Composer. When you click on the group, a window pops up where you can uncheck any addresses you don’t want to receive the current message. From the window, you can also see the encryption lock icons, which tell you the encryption and signature status for each recipient.

Read receipts

When you send a message, you can request a confirmation that the message has been received and opened by the recipient. Just click on the “More” icon in the Composer and select “Request read receipt”:

When this feature is selected, the recipient will see a banner asking them to send confirmation. When the confirmation is sent, a message is delivered to the sender’s Inbox:

Typo warnings

Another feature we added is an alert for potentially incorrect recipient addresses. If you enter an address that looks like it might be a mistake, we now show the address in a red rectangle, letting you know to double check it. For example, if an address is entered with an “” domain, we will flag it as a potential typo:

Storage limit

ProtonMail will now warn you when your Inbox is almost full, and we have improved the visibility of full Mailboxes to avoid any confusion about why messages are not arriving or cannot be sent.

If your Mailbox reaches 90% of its storage space, a warning will appear letting you know that you will need to free up more space or upgrade your account:

When your Mailbox quota reaches 100%, you will see a permanent warning banner at the top of your Inbox:

We’re excited about the new productivity features in the latest version of ProtonMail. Please join us on Facebook, Twitter, Instagram, and Reddit, and let us know your feedback!

Best Regards,
The ProtonMail Team

About the Author

Ben Wolford

Ben Wolford is a writer at Proton. A journalist for many years, Ben joined Proton to help lead the fight for data privacy.


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12 comments on “ProtonMail v3.15 Release Notes

  • Are you working on making the contacts sync with the phone contacts system? Many people want this and have been waiting so long.

    Thank you for adding contact groups. Something I forgot all about and is handy indeed!

  • Thanks for adding read receipts. I would like to see an option to enable read receipts for all messages rather than selecting the option for each message.

  • Glad to see continued development. One feature I need to have before making the switch entirely is Undo Send. I’ve just grown so accustomed to it. :) Undo Send with time options ranging from 5 seconds, 10 seconds, 15 seconds, and 30 seconds. I know others like me who are waiting for this.

    Thanks again!

  • I need contacts that sync with Android phone and calendars before I can get off gmail. Until then, I have to straddle both systems.

  • You started the calendar feature over a year ago…
    Could you give us a timeline when you think it will be implemented ?
    many people wait for that feature …
    If you have completely other priorities just tell us …

    • Our calendar is currently under development. It’s a complex project so it requires quite a lot of resources. We are grateful for your patience.