FORUM: I signed up for my new Zoho email account 3 days ago (switching from Earthlink). I had no problems SENDING several emails to a Friend@yahoo.com UNTIL TODAY. Now they are ALL rejecting with this message:

-----The following addresses had fatal errors-----

[Status: Error, Address: <Friend@yahoo.com>, ResponseCode 421, 4.7.0 [TSS04] Messages from 135.84.80.237 TEMPORARILY DEFERRED DUE TO USER COMPLAINTS - 4.16.55.1;

see https://help.yahoo.com/kb/postmaster/SLN3434.html ]

Please HELP me.

What do I have to do to solve this?

Thank you.