Just as there are postal surges in junk mail, there are seasonal times when spammers are out to generate more income and the deluge of unwanted mail ensues. Everytime that you enter your email address online for ecommerce or membership opens the door for that email to be made available to the spammers. Privacy policies are BS when an employee sells personal information about customers, or the site is broken into and that same info is stolen and resold on the darknet multiple times.
You may be receiving multiple different spam email from the same source that simply changes their From Mail header address and subject matter. It may come from one or multiple Mail servers, both foreign or domestic that permit the changes in this paragraphs first sentence.
Your options are slim. Either filter Mail headers on Return-Path (the originating Mail server), or use a third-party product like SpamSieve. Yesterday, I received over 40 spam emails, all automatically handled by a set of Mail rules that filter on the Return-Path server address. Very seldom, but sometimes spammers accounts are closed on Mail servers they rent and then a new rule may be necessary for the replacement Mail server address.
It is not Apple's responsibility to filter your email. You can select a spam message, right-click on it, and choose forward as attachment. This opens a new email compose window with that message attached. You could send this to:
reportphishing@apple.com
without any body text from you and a simple subject line of Phish/SPAM. This goes to an Apple sub-contractor, and may or may not generate a reduction in spam.
This is a passive approach and should not replace an active measure on your behalf to filter spam with the choices described above.
