Let's Debug

Test result for sendy.colcolmail.co.uk using http-01

Debug
Requests made to the domain
Request to: sendy.colcolmail.co.uk/52.16.62.68, Result: [Address=52.16.62.68,Address Type=IPv4,Server=nginx/1.10.3 (Ubuntu),HTTP Status=404], Issue:
Trace:
@0ms: Making a request to http://sendy.colcolmail.co.uk/.well-known/acme-challenge/letsdebug-test (using initial IP 52.16.62.68)
@0ms: Dialing 52.16.62.68
@167ms: Server response: HTTP 404 Not Found

Debug
A and AAAA records found for this domain
sendy.colcolmail.co.uk. 0 IN A 52.16.62.68
Challenge update failures for sendy.colcolmail.co.uk in order https://acme-staging-v02.api.letsencrypt.org/acme/order/5751349/80362632
acme: error code 403 "urn:ietf:params:acme:error:unauthorized": Invalid response from http://sendy.colcolmail.co.uk/.well-known/acme-challenge/W6m-eim7uD1UOBcXD35Js28gHfwv4OojQzrrcmIbjsk [52.16.62.68]: "<html>\r\n<head><title>404 Not Found</title></head>\r\n<body bgcolor=\"white\">\r\n<center><h1>404 Not Found</h1></center>\r\n<hr><center>"
Debug
The IANA public suffix is the TLD of the Registered Domain
The TLD for sendy.colcolmail.co.uk is: co.uk
Debug
3 Certificates contributing to rate limits for this domain

Serial: 264582833643875636629600290730933178753452
NotBefore: 2020-03-14 13:15:25 +0000 UTC
Names: [colcolmail.co.uk www.colcolmail.co.uk]

Serial: 277854906664171776988488123826437606047988
NotBefore: 2020-03-14 13:14:47 +0000 UTC
Names: [colcolmail.co.uk www.colcolmail.co.uk]

Serial: 329098047151907155151879525653252800749577
NotBefore: 2020-03-14 13:14:11 +0000 UTC
Names: [colcolmail.co.uk www.colcolmail.co.uk]

Debug
The current status.io status for Let's Encrypt
Operational

Submitted Mar 20 22:25:05 2020. Sat in queue for 2ms. Completed in 10s. Hide verbose information.