In the field marked Server Type, select IMAP.
In the field marked Server Address under Incoming Server Information, type imap.videotron.ca and make sure the port is set to 143.
In the field marked Server Address under Outgoing Server Information, type relais.videotron.ca.
Change the port number from 25 to 587.*
Check Requires Authentication.
In the field marked Logon User name, enter your Videotron email address in lower case and without accents.
Click on Next.
*Port 587 ensures that Videotron's SMTP service remains available regardless of the network through which you access it.