Fraudulent emails from me to myself

This type of scam email has been going around for years.

You obviously can't blocked the spoofed sender address since that's you, and you will stop receiving all emails to that account.

When I had to deal with these in our small business, I blocked them by using repeated phrases in the body. I'm sure they kept sending them, but their junk never reached the InBox. No idea how many were automatically killed by SpamAssassin. Likely thousands.

Just to give you a visual of what I wrote …

This is how SpamAssassin looks when setting up filtering rules, but just apply the same idea to what you're using.

Ignore the first Spam Bar entry. This example was using a setup where an email had to match two filters before killing it.

Choose Body so the filter is looking at the body text of all incoming emails. Then use contains so the filter looks for a specific string of text. Look through a half dozen or so of these dumb scam emails and look for a line that's in every one, and definitely wouldn't be in any legitimate email. Like, I've installed a Trojan virus, and put that in the text field (where this example says SEO|seo). And finally, choose to discard any email that matches the filter.

This is how we killed all of these emails (and others). Since SpamAssassin was part of our hosting services email server, anything that was discarded never reached an InBox. For all intents and purposes on our end when retrieving mail, they never existed.

About the only way to have this stop is to create a new email address and then move the email you have and want in the old account to you new one.

I did, but we no longer do since we closed our business down over two years ago.

No idea how many were automatically killed by SpamAssassin.

But as I mentioned just above, it's only an example of how to set up a rule to kill emails by body content. Use whatever tool a person does have to achieve the same thing.

You didn't mention on your original question that you were using SpamAssassin.