It may be that ever fewer were using it, so, just like they no longer promote the webspace they once offered residential clients, email may also be disappearing. Given that Android phones are so tightly integrated into the Google ecosystem that you can't sensibly use one without a google account, Windows phones the same, leaving Apple as the only major supplier of smartphones where you need a different primary address to access an iCloud address and account.
Microsoft & others are moving to a subscription-based model for office software - requiring an Outlook.com address or other similar credentials to access.
Add to that the number of folks switching ISP when a better deal comes along, what was once a hook to keep clients becomes a liability.
Free email services abound, and you can roll your own for about $10 per year, so it becomes ever easier to have an email address independent of your ISP.
New customer just switched over from Shaw. The instruction 'book' left by the installer showed that email accounts could be created in the My Account section. I don't know when this changed but reality doesn't match what is in the print (no date on these cards but it says Version 2). Very disappointed to have to use Chat and wait in a queue behind 18 other customers. And what's with the 8 character limit on email account names?
Not impressed with this aspect of Telus.