I am currently setting up a new laptop and trying to create my telus.net account in Thunderbird as it was on my previous laptop. I followed the Telus thread for the manual install on Thunderbird but I continue to get an error "Unable to log in at server. Probably wrong configuration, username, or password. My gmail account installs without issue.
Thanks for any advice that may help.
I can only say that I did add the new G Suite Gmail account to my desktop Monzilla Thunderbird program. I used IMAP (previously was POP) and followed the Telus procedure. One source of confusion can be using existing standard Gmail accounts vs the Telus created G Suite account. They are different.
If you haven't been migrated yet, then you need to set up with the old credentials.
Try the following
Host: IMAP.telus.net with user name & password
SMTP Port 1025 SMTP.telus.net User name & Password
Use SSL ON
Else the current info is here.