Yahoo reporting "No MX or A Records" and bouncing emails

[quantumfoam at gmail.com (Jonathan Rogers)]

Greetings Programs,

Yahoo is bouncing email that is being sent to a customer of mine with the
error that no MX or A records were found for the domain. There is nothing
wrong with the domain at all, which I have verified from multiple sources.

Does anyone have any suggestions about who I can reach out to at Yahoo to
get this matter resolved?

Many Thanks,

Jonathan Rogers
PCM, Inc