index.js
function smtpVerifyDomain(callback,email) {
    if ((email===undefined)||(!email.length)){
        return callback(returnError('Empty email'));
    }
    sendRequest( 'smtp/domains/'+email, 'GET', {}, true, callback );
}
function smtpVerifyDomain(callback,email) {
    if ((email===undefined)||(!email.length)){
        return callback(returnError('Empty email'));
    }
    sendRequest( 'smtp/domains/'+email, 'GET', {}, true, callback );
}
SMTP: verify domain

@param callback
@param email