This would be a useful addition to increase security and trustworthy of emails sent by Protonmail users.

As a comment to Kei Onimaru; I wouldn’t add self defined methods for trust. Dmarc and BIMI both are well accepted industry standards. Proton should follow official standards and be involved in developing well adopted standards instead of creating own.

Even if Proton doesn’t want to implement BIMI, it would still be very helpful to have some way for users to visually distinguish trusted senders at a glance in the message list. For example, allowing user-defined icons or a simple visual cue would make it much easier to spot important emails without relying on BIMI certificates.

Yes, i think proton devs should quickly adapt BIMI [https://support.google.com/mail/answer/13130196?hl=en&visit_id=638650473133055987-3957147276&p=bimi_verification&rd=1] as 'Official' label.

Has this been implemented?

Added value for private individuals who use e-mail a lot.

So, the Police in the Netherlands started using BIMI for their emails...

This would be great. Adding it with custom or integrated domains. for example having a hosting url for an image using the drive of the user for example.

This should be implemented on every e-mail client.

I am not sure if Microsoft 365 and Tutanota support BIMI, but it would be really nice to have it for Proton Mail definitely.

I'm seeing branding logo's within Proton mail lately.
Are these coming from BIMI, or is a different standard being used?

I'd also really like this feature, as I'm using protonmail for my professionnal email. It would make it easier for me to recommend protonmail to my clients.

Gmail just implemented it. Would be great to have Proton display some kind of indicator to help fight phishing.

https://it.slashdot.org/story/21/07/13/1758251/gmail-deploys-support-bimi-security-standard?utm_source=feedburner&utm_medium=feed&utm_campaign=Feed%3A+Slashdot%2Fslashdot+%28Slashdot%29

For reference https://tools.ietf.org/id/draft-blank-ietf-bimi-01.txt