@3rde hello,
yes i found the solution for this. and its funny but worked with me. when we configure account and set the domain and select our domain type that is .in or .com that time we have to sellect opposite of the correct.
means if my domain is end on .com then in zoho mail plugin setting i have to select .in and same for .in domain. its worked for me 3 domains. you must try once. and let me know.