Let's Debug

Test result for mail.topperfloats.com using http-01

Debug
Requests made to the domain
Request to: mail.topperfloats.com/74.85.224.14, Result: [Address Type=IPv4,Server=Microsoft-HTTPAPI/2.0,HTTP Status=404], Issue:
Trace:
@0ms: Making a request to http://mail.topperfloats.com/.well-known/acme-challenge/letsdebug-test (using initial IP 74.85.224.14)
@0ms: Dialing 74.85.224.14
@127ms: Server response: HTTP 404 Not Found

Debug
A and AAAA records found for this domain
mail.topperfloats.com. 0 IN A 74.85.224.14
Challenge update failures for mail.topperfloats.com in order https://acme-staging-v02.api.letsencrypt.org/acme/order/5751349/33791100
acme: error code 403 "urn:ietf:params:acme:error:unauthorized": Invalid response from http://mail.topperfloats.com/.well-known/acme-challenge/YZMfYbj3v7b-wCguAH9vioGUf5ocG1KudShdg4JxtVY [74.85.224.14]: "<!DOCTYPE HTML PUBLIC \"-//W3C//DTD HTML 4.01//EN\"\"http://www.w3.org/TR/html4/strict.dtd\">\r\n<HTML><HEAD><TITLE>Not Found</TITLE>\r"
Debug
The IANA public suffix is the TLD of the Registered Domain
The TLD for mail.topperfloats.com is: com
Debug
The current status.io status for Let's Encrypt
Operational

Submitted May 13 19:11:41 2019. Sat in queue for 5ms. Completed in 2s. Hide verbose information.