nostr:npub1e7vndtpf0s9pcg6yxkmvwvfq2g56rg5694nlgthwg7j2hkjgeuwq65flg9 I think the best response would be none, then set up a filter to automatically bin any future emails from them.

If you can't be arsed to communicate with me in your own words, you are not worth my time.