Emails we've sent to Yahoo users through sender1.zohomail.com are being rejected by Yahoo. I am assuming this is due to the multiple DNSBLs Zoho is apparently on all of a sudden.
What is being done to work this issue with priority?
Here is what we're getting back from the mailer-daemon,
----- The following addresses had fatal errors -----
[Status: Error, Address: <userxxxx@yahoo.com>, ResponseCode 421, 4.7.0 [TS01] Messages from 74.201.84.158 temporarily deferred due to user complaints - 4.16.55.1; see http://postmaster.yahoo.com/421-ts01.html]
Message will be retried for 4 more day(s)