@hjnicol wrote: I don't need Shaw Support, sending me ads for a Vancouver Island landscaper.
Just because you received an E-mail message, it does not imply that Shaw_together_with_Rogers was the sender of the message.
The sender could have "spoofed" the value in the "FROM:" field, to falsely claim to be Shaw Support.
If somebody comes to the front door of your home, and claims to be Justin Trudeau, take a selfie with the person, and post the picture of the imposter (or look-alike).