Hi:

   I performed a request to add an email alias for an existing account with the following details

     URL  http://mail.zoho.com/api/organization/zoid/accounts/account

     Verb POST

     Request Data: 

     {

           "mode" : "addEmailAlias",

           "emailAliases" : "daniela"

     }

     I replaced zoid and account values with my organization and accounts ids.

     The api returned the following response

     {"data":{"errorCode":"INVALID_METHOD"},"status":{"code":404,"description":"Invalid Input"}}