iOS 26 - S/MIME Encryption / Certificates

Question

Created 4w

Replies 2

Boosts 0

Participants 2

Hi everyone. Since the update to iOS 26, we are no longer able to tap the person's name and view the certificate of a signed email and choose to install the certificate or remove it. This has always worked just fine but seems to be broken on iOS 26 and I have verified that it does not work on iOS 26.1 beta as well. The part that is strange is it does work just fine on an iPad running iPad OS 26.

This makes it impossible to send encrypted emails to someone via the mail app on an iPhone. I have found a temporary workaround which is to install Outlook for iOS and install the certificates through that app which then allows me to send encrypted emails via Outlook.

This appears to be a bug just with the iPhone as I have also seen a few other people online talking about the same problem. Has anyone found a solution to this?

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Answer 1

Gulfstream5 OP

2w

I have been talking to an individual on here, https://forums.macrumors.com/threads/s-mime-ios-26.2467497/?post=34185551#post-34185551 and they discovered that messing with the contact card allows the certificate to appear. I confirmed that even editing the contact to include a space in the notes, or pretty much any edit then works. Great find from this user!

1

Answer 2

M1N0 OP

1w

Hi Apples. My experience with the Outlook account is that it tried to log me in 3 times a day even after I had already signed in and was logged in. In the end, I decided to completely delete it from iOS along with all Microsoft apps, including extensions, on all my devices, but it still keeps showing me the “Sign in” prompt. So far. Would you like the translation to sound more formal or casual?

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