Mails Blocked By Yahoo

Mails Blocked By Yahoo

Email sent to a yahoo account bounced with the following error message. SPF and DKIM has already been set up correctly and validated by Zoho for the sending account

[Status: Error, Address: <xxxxxx@yahoo.co.in>, ResponseCode 421, 4.7.0 [TSS04] Messages from 103.117.158.54 temporarily deferred due to user complaints - 4.16.55.1; see https://help.yahoo.com/kb/postmaster/SLN3434.html]