Zoho - Blacklist

Zoho - Blacklist


Error:
 relay=mx.zoho.com[165.254.167.50]:25, delay=3.9, delays=0.01/0/3.2/0.62, dsn=5.4.1, status=bounced (host mx.zoho.com[165.254.167.50] said: 541 5.4.1 Mail rejected by destination domain (in reply to RCPT TO command)

ist the IP in the Blacklist?