My Canon MF267dw cannot scan to email. Here is what I've done based on scattered conversations and tutorials across the web.
I logged into the remote UI as a system admin
I set the port number to (587)
It's SMTP Server connects to smtp.gmail.com
I added my email address and password in E-Mail Settings*
I enabled TLS for SMTP
The printer behaves exactly how it did before I changed anything. After choosing the destination E-Mail, I can click Start to scan. Then the only options I have are: Start again, to scan another page; cancel to leave; and a button that says "Start TX." This mysterious button is not mentioned in any videos or forum posts I've found. When pressed it prints page with a timestamp and summary, says 0 sheets were scanned, and under Error it says 1.
There is no button that says "Done," and no indication of any kind about whether it sent something or tried to and failed.
*This part was different than every tutorial I've found. I think the UI has been reorganized, or subtly differs from model to model. Other people found these settings under E-Mail/I-Fax Settings, or TX Settings, neither of which appear on my remote UI