Whitelist an address with wildcard domain, O365?

I am currently using Office 365 online and we have a user who is receiving subscribed e-mails on a daily basis, these e-mails are coming from a different domain name each time and, as such, are being filtered to his junk mail every time with the message: "This message was marked as spam using a junk filter other than the Outlook Junk E-mail filter"

I am trying to figure out how I can whitelist an address that is constantly changing its domain. I know I can use wildcards for the localpart of the address (*@domain.com), but how would I do the same for the domain?

Here's an example of e-mails addresses from the subscribed sender:

vista.today@mail147.suw12.mcsv.net

vista.today@mail7.suw13.rsgsv.net

vista.today@mail120.suw13.rsgsv.net

vista.today@mail227.atl61.mcsv.net

Thank you for any help!