The bounce message in the sqlite.org server mail log says: > To request removal from this list please visit https://sender.office.com/ and follow the directions. I did this. The page wants an email address for verification and the IP address to be unblocked. I entered both. An email was sent (to drh@sqlite.org) which went into spam, but I was able to dig it out. The text said (literally): > please confirm your email address by clicking the following link: Confirm your email address With no hyperlink. So I had to dig into the email source text to find the original message: ~~~~ ----boundary_1_2e3f11f4-1877-4e8f-aad1-6998e14dc347 Content-Type: text/html; charset=utf-8 Content-Transfer-Encoding: base64 PGh0bWw+PGhlYWQ+PG1ldGEgaHR0cC1lcXVpdj0iQ29udGVudC1UeXBlIiBjb250ZW50PSJ0ZXh0 L2h0bWw7IGNoYXJzZXQ9dXMtYXNjaWkiIC8+PC9oZWFkPjxib2R5PjxpbWcgc3JjPSJjaWQ6SGVh ZGVySW1hZ2UiIC8+PGJyIC8+PHA+VGhhbmsgeW91IGZvciBzdWJtaXR0aW5nIGEgcmVxdWVzdCB0 byBkZWxpc3QgYW4gSVAgYWRkcmVzcy4gVG8gY29tcGxldGUgdGhlIHByb2Nlc3MsIHBsZWFzZSBj b25maXJtIHlvdXIgZW1haWwgYWRkcmVzcyBieSBjbGlja2luZyB0aGUgZm9sbG93aW5nIGxpbms6 IDxhIGhyZWY9Imh0dHBzOi8vc2VuZGVyLm9mZmljZS5jb20vRGVsaXN0L0RlbGlzdElQP2VtYWls PWRyaCU0MHNxbGl0ZS5vcmcmYW1wO2lwPTQ1LjMzLjYuMjIzJmFtcDt0dGw9NjM3MjI1NjExMDg4 MDAzMDg2JmFtcDt0b2tlbj1KbGFNd0JyNnhtT3RjWFRLJTJieDY5V3hXRU95S29yTWZZODFiajg4 ak1ZeTQlM2QiPkNvbmZpcm0geW91ciBlbWFpbCBhZGRyZXNzPC9hPjxiciAvPjwvcD48cD4qKk5P VEUgLSBQbGVhc2UgZG8gbm90IHJlc3BvbmQgdG8gdGhpcyBlbWFpbC4gSXQncyBzZW50IGZyb20g YW4gdW5tb25pdG9yZWQgYWRkcmVzcy4qKjwvcD48L2JvZHk+PC9odG1sPg== ----boundary_1_2e3f11f4-1877-4e8f-aad1-6998e14dc347 ~~~~ Decoding the base64 yields some HTML: ~~~~ <html><head><meta http-equiv="Content-Type" content="text/html; charset=us-ascii" /></head><body><img src="cid:HeaderImage" /><br /><p>Thank you for submitting a request to delist an IP address. To complete the process, please confirm your email address by clicking the following link: <a href="https://sender.office.com/Delist/DelistIP?email=drh%40sqlite.org&ip=45.33.6.223&ttl=637225611088003086&token=JlaMwBr6xmOtcXTK%2bx69WxWEOyKorMfY81bj88jMYy4%3d">Confirm your email address</a><br /></p><p>**NOTE - Please do not respond to this email. It's sent from an unmonitored address.**</p></body></html> ~~~~ I put that HTML into a file on disk, then brought up the file in a web-browser, thus gives me the hyperlink. I click on the link. Then the page tells me: > The IP address in question is not currently blocked in our system. (Sigh....)