Formatting Error: certain mails are not formatted properly

[evanferrao]

Affected sites:
(1): ProtonMail: Making a Proton account with recovery email provided by burner.kiwi results in a weird verification message. The message seems to be encoded in base64 and is visible after decoding it from base64decode.org. I've attached images below for reference

(2) Render: The render.com verification email is also not formatted properly, there are extra 'characters' like = and some more. As a result, the verification link is invalid. This can be verified by trying to make an account on render.com using spacial.autos or adequate.fun

Proton:

Render:

On render, even after removing the = the link is still invalid, which leads me to believe that there are more unnecessary characters inserted that are breaking the link.

[haydenwoodhead]

Thanks for the detailed report. Will take a look this weekend.