how to block phishing emails

If they have something in common, for example the same sender or subject, for an iCloud account, go to iCloud.com/Mail, click the gear at the bottom left, and select Rules. Then create a Rule to move them to the Trash/Delete the e-mail.

See -- Avoid phishing emails, fake 'virus' alerts, phony support calls, and other scams - Apple Support & Phishing & Other Suspicious Emails.

Be sure to report/forward them to reportphishing@apple.com.

You can also create rules to have them immediately deleted -- Use rules to manage your email inbox - Apple Support & iCloud: Filter email automatically.

You may also wish to create an alias email so those bothersome emails will go there instead of to your personal email -- iCloud: Create or change email aliases.