Hi Me. Regarding this spam situation, the spam filter will mostly block them but, if you have more coming in, you could get into your Webmail access to manually filter them.
1- Connect to Webmail: < https://courrielweb.videotron.com/cw/displayLoginEnLegacyResidentiel >.
2- At the left bottom of the page, click on Options.
3- Go up in the left column and click on Local account, messaging and Create filter.
4- Add a new filter and put in the email address that you need to block.
Have a good day!