Dear all the following message has been shown in barracuda:
Deferred: host mx-eu.mail.am0.yahoodns.net[220.127.116.11] said: 421 4.7.0 [TSS04] Messages from temporarily deferred due to user complaints - 18.104.22.168; see https://help.yahoo.com/kb/postmaster/SLN3434.html(in reply to MAIL FROM command)
What is happening? My IP is clearly not in any of the SPAM check site list. Though the above is shown in barracuda.
Can any one tell me about it?