Can the Recipient Decrypt Emails When Not Using Gmail or Chrome?

I opened Gmail in Mac Safari and the email was encrypted. I could not read it.

But when I opened it in Chrome, it auto-decrypt and I could read the email.

Does this mean that when I send an encrypted email and if the recipient uses Safari, he won’t be able to read the email? And if he/she has FlowCrypt and Chrome, it will auto-decrypt?

When the recipient has FlowCrypt or any other compatible OpenPGP software set up, they can read it anywhere they set it up. For example, you have set it up in your Chrome browser, which means you can read encrypted emails in that browser. If there is an extension that works with Safari, you could set it up there, too. Our product roadmap includes apps for Chrome, Brave, Firefox, Thunderbird, Outlook app, Android, iOS, and more. You’ll need to have some sort of OpenPGP-compatible software on every platform that you plan to use encrypted messages on.

However, when you send someone an encrypted email and the FlowCrypt Secure Compose window indicates that the recipient doesn’t use encryption, the message will be encrypted using a different mechanism (simple password encryption). The recipient will see a link in the email they receive. Following the link will allow them to decrypt the message if they know the password you’ve used to encrypt the message. The recipient can open such messages using any modern browser, so it doesn’t matter which browser or email provider they use.

In short, if someone has OpenPGP software set up, they can communicate with you smoothly only when using devices on which they have it set up. If they don’t have anything set up, they can still open your messages on any device, but they’ll need to know the password to open each message each time.