Yahoo is blocking my emails (RROR_CODE :451, ERROR_CODE :Message temporarily deferred - Abaca)

Yahoo is blocking my emails (RROR_CODE :451, ERROR_CODE :Message temporarily deferred - Abaca)

Hello,

It's been a few days now and I keep getting the same error whenever I try to send an email to any Yahoo account.

The error is  ERROR_CODE :451, ERROR_CODE :Message temporarily deferred - Abaca

As you can see from the following image, my email is properly configured, and this error is surely coming from Zoho's side.



Can you please investigate and see what is going on?

Thanks,