Put email attachment ( though looks a bit innocuous) somewhere safe..that is the official notification and will be required again..gives visa #, it's lifetime and other personal info..there is no longer a full page visa just a stamp on entry with a small "e-visa" notation..
Individual regular Income of the applicant is often the problem with Canadian applications ..and generally one is directed towards "sponsorship" applications otherwise...a much more tedious and complicated process.
However there may be allowances for marriage status, if things have changed.