Same here. When I try testing the connection it points to webmail2.telus.net which is responding to pings just fine but no content coming out of either URL. Neither IMAP or POP connection works.
It's back at 4:15 PDT. I was just asked to update my recovery email, and password upon logging in to webmail. Seems there were a few behind the scenes changes.
I have been having this problem on and off for months. This morning, my email was fine and this afternoon it was out and is now mysteriously back on. I couldn't get on to webmail either and then both webmail and apple mail came back on at the same time. When I call Telus, they tell me it's my email client or my computer or anything which absolves Telus. But from these postings, it seems like this is not just my issue and does have something to do with what Telus is doing and either their representatives don't know about it or they are unwilling to say so.
Would appreciate whatever feedback or ideas others have.
You can change your preferences so you don't receive these emails:
Profile (upper right corner of screen) > Settings > Preferences > and uncheck "Automatically Subscribe me...."