One useful trick when giving out a email address to a company is to use plus addressing to create essentially a disposable address that you can filter on.
For example, if you have a
user@domain.com address and need to give it to Costco, give them costco
+user@domain.com. If they use that email address it will go to the right mailbox but if you start getting spam sent to that address you can create a filter that automatically deletes or moves to a junk folder any mail sent to that (plus) address. That is much better than trying to filter new mail based on the sender, which is easily spoofed.
Most email providers seem to support plus addressing nowadays even though they might not mention it.