Save encryption passwords for non-PM contacts, also add a checkbox to send the password as a privnote style second link in the email.
When emailing an outside contact, save the encryption password to the contact, so next time you message them it automatically fills in that field with the agreed upon password.
So if I message someone and they have a password to access the message, next time I send it would default to encrypted with the same password.
You could also add a checkbox to send the password in the actual email as a second link that destroys when read, (just like privnote, which is how I send my passwords anyway)

We will be adding the ability to save a password for an outside account. We will look into also adding the ability to send the password through a self destructing link.
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DrSteve commented
I send 15-20 monthly statements, each with a unique client password. Saving the password to the contact would save me time, and possible errors (like forgetting to encrypt the email), every month.
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Justin commented
Did this get implemented? As a user who regularly uses Protonmail to communicate with accountants and lawyers and wants mails to be encrypted, I have a distinct secret key for each vendor that is re-used for all communications with them. It would significantly reduce the number of steps required to send an email and eliminate the risk of accidentally sending an unencrypted message if I could set an encryption key at the contact level that is used for all communications to that contact. Today, I have a LastPass note with my shared keys and I have to manually go into that note and grab the appropriate shared key to apply to the message.
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fab commented
Hi. Any update on this functionality?
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Anonymous commented
What's the status?
I would really like to see this option so I can set a 'default' password per contact.
ZIVVER does this already and also has an SMS code option. -
Anonymous commented
Adding a change password field in Protonmail Contacts would be great, and allowing each contact to set their own password through a self destructing link would be amazing. That way each contact can have their own unique password, that I can not read.
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Ken commented
Yeah, I think a similar use case is probably common.
I find myself always adding in the Password and Hint. I use the same one every time. I just want all my email to always be ephemeral. So, whatever way you determine to do that would be nice. My threat model doesn't really include someone stealing a PC as I think that's (somewhat) rare.
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Rob McDowall commented
I just thought about this myself and seen you have raised this as a feature suggestion. I agree!
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Associate Email Encryption Password With Contact