You can try adding them to the blocked sender list, but that's not very
effective, as they keep changing their email address.
Right-click on a message, select "Junk E-Mail" - "Add Sender to blocked
sender list"
Message rules can often be effective, if there is a common word or phrase in
the Subject or Sender fields.
Tools - Message rules - Mail
New
1. [x] Where the From line contains people
2. [x] Delete it
[x] Mark it as read
3. click on "contains people"
in the box, type "canadianpharmacy"
click on Add
ok
4. enter a name for this rule
ok
ok