Cfmailparam (suddenly) can't find attachments

Ah, this was most helpful. There is definitely something there. Checked across a few different sites and the ones not working I’m getting this back:

errordetail: Unknown host: PKIX path building failed: sun.security.provider.certpath.SunCertPathBuilderException: unable to find valid certification path to requested target
filecontent: Connection Failure
statuscode: Connection Failure. Status code unavailable.

I’ve never done what @David_Anderson mentions before, but will give it a shot now!