SMTP Error even with the correct settings.

SMTP Error even with the correct settings.

Just talked this over with the wordpress tech support, they said everything is set-up correctly even the zoho settings(They checked the SMTP settings). I have been using the correct username password too to setup my smtp the problem is I keep getting this error :

SMTP ERROR: DATA END command failed: 553 Relaying disallowed as xxxx @mydomain.com (censored my domain)
SMTP Error: data not accepted.

this error is disallowing me from using contact form 7 to send emails directly to my zoho mail.

Please help!