The contact form is linked in the article [1], and it rejects genuinely valid emails. You can try it yourself and see it doesn't have greyed examples, and that the problem is not example.com but the use of symbols. For example, greffe_acces@montréal.ca is a valid in-use email [2] that is rejected.
example.com was only used to take an example screenshot.
example.com was only used to take an example screenshot.
[1] https://adamjones.me/blog/dont-use-contact-forms/#:~:text=ma...
[2] https://montreal.ca/sujets/politique-de-confidentialite#:~:t...