Most emails full resource shows the mails Top Level Domain (TLDs). Is it possible, either by temporarily using Shaw WEBmail GUI or a private email client to block/deny/ or delete unwanted emails by blocking the TLD?

*I don't use public mail systems like webmail, but will use the Shaw webmail GUI if I can block the TLD there so when a secure client pulls the mail, that the TLDs mails are already deleted by Shaw at Shaw post office? 

h.

* I've yet to find a email client that has this in it's filters and anyway, I want it deleted at the post office (mail server).