Resolved -
Yahoo seems to have fixed the false positive block. We might still see some delays in delivery as yahoo: 450 bounce codes. To be transparent this is a copy of latest reply from Yahoo Postmaster:
12 DECEMBER 12:41 pm CET
Hello mySMTP,
Thank you for contacting us back.
I'm sorry, but it's taking longer than we expected to fix this. Rest assured, we’re focused on getting this corrected for you.
There are several factors that go into resolving this type of issue including diagnosing, troubleshooting, and implementing the fix. As such, we're unable to provide an estimated time for when this issue will be resolved.
We appreciate your continued patience while we work to get this fixed as quickly as possible.
Thank you again for contacting Yahoo Postmaster.
Regards,
Andrea Yahoo Postmaster
Dec 13, 08:12 CET
Investigating -
We are investigating false positive blocks from Yahoo, trying to mitigate ASAP
Dec 9, 12:19 CET