Proton

Proton Mail now offers Undo Send, letting you cancel outgoing emails

Have you ever fired off an ill-considered email and then thought oops! the moment you hit Send? Or have you sent off an email intended to impress the recipient, realizing with horror, seconds too late, that you have misspelled their name? And the “Reply all” button has been a recipe for far too many disasters. 

Whatever the reason, Undo Send is one of the most popular features(new window) requested by Proton Mail users. It is now automatically enabled for all our users in the mail.proton.me(new window) web app, and provides a variable length second window during which you can opt to cancel sending an email. 

How to use Undo Send in Proton Mail

When you send an email, the email composer window will close and you will see a banner at the top of your screen which says “Message sent.  Undo.”

If you click the Undo button within the specified time limit, the composer window will reopen and you can continue editing the draft email. 

Undo Send is enabled by default with a 10-second timer . You can change the timer duration from 0 seconds (i.e., Undo Send disabled) to your preferred timer length by going to Settings → All settings Messages and composing Composing → Undo Send.

A core part of our mission is to design tools that are secure, protect your privacy, and are also easy to use. To that end, we hope Undo Send will make Proton Mail more convenient and useful for you, and we look forward to hearing your feedback on this and other features in the Proton Mail Version 4.0 beta.

Undo Send FAQ

Who can use Undo Send?

Undo Send is available to everyone on Proton Mail.

Which platforms is Undo Send available on?

Initially, Undo Send will be available in the Proton Mail web app. However, it will be included in upcoming versions of our iOS and Android apps.

Do I need to enable the feature?

No. Undo Send is automatically enabled for everyone on Proton Mail with a default timer delay of 10 seconds.

Can I change the timer delay settings?

Yes. Simply click Settings Go to settings Messages and composing Composing → Undo Send and select your preferred timer length from the drop-down menu. Setting the timer to 0 seconds disables the feature.

Can I recall the email after the timer period is over?

No. Undo Send only delays sending an email for a few seconds. It cannot recall an email once it has been sent. (However, our self-destructing emails(new window) feature does provide a related functionality.)

You can get a free secure email account from Proton Mail here.

We also provide a free VPN service(new window) to protect your privacy. Proton Mail and Proton VPN are funded by community contributions. If you would like to support our development efforts, you can upgrade to a paid plan(new window). Thank you for your support.

Updated Jan. 13, 2021.


Feel free to share your feedback and questions with us via our official social media channels on Twitter(new window) and Reddit(new window).

Secure your emails, protect your privacy
Get Proton Mail free

Related articles

proton scribe
Most of us send emails every day. Finding the right words and tone, however, can take up a lot of time. Today we’re introducing Proton Scribe, a smart, privacy-first writing assistant built right into Proton Mail that helps you compose and improve yo
People and companies are generally subject to the laws of the country and city where they are located, and those laws can change when they move to a new place. However, the situation becomes more complicated when considering data, which can be subjec
Your online data is no longer just used for ads but also for training AI. Google uses publicly available information to train its AI models, raising concerns over whether AI is even compatible with data protection laws. People are worried companies
iPhone stores passwords in iCloud Keychain, Apple’s built-in password manager. It’s convenient but has some drawbacks. A major issue is that it doesn’t work well with other platforms, making it hard for Apple users to use their passwords and passkeys
There are many reasons you may need to share passwords, bank details, and other highly sensitive information. But we noticed that many people do this via messaging apps or other methods that put your data at risk. In response to the needs of our com
Large language models (LLMs) trained on public datasets can serve a wide range of purposes, from composing blog posts to programming. However, their true potential lies in contextualization, achieved by either fine-tuning the model or enriching its p