Jean_Desnoyers.
I recently purchased a Canon Imageclass MF632cdw. I was having similar issues with the scan to email function from the printer. I followed the instructions per Canons Website, Youtube Videos, and other Forums in addition to this one. No luck. Then you mentioned in your reply to Canon about 2 Factor Authenticaiton. I use 2 factor for both of my email clients. I have not seen any response from Canon regarding this nor did any of the other forums mention this as well. So with iCloud and gmail, that i know, have a feature called “App Specific Passwords”. So I generated one and Jackpot, it worked. If it wasn’t for you mentioning 2 factor I probably would of been fumbling around. I was checking router settings, DNS settings, port forwarding, etc. Thanks.
Tony