AEM: 403 Forbidden occurs when call a Post servlet

Question

My problem is similar with this: CQ5: 403 Forbidden occurs when call a Post servlet but in AEM 6.1

According to accepted answer of above topic, I must remove POST from A

Answer 1

If you are trying to POST data to AEM instance from outside AEM, thats the solution. Its not advised for security reasons. But if its a must you could add authentication to your POST requests and setup the CSRF security measures. In addition to this you could setup your dispatcher to allow the POST request only to selective paths and block the remaining. Even so following all this doesn't guarantee complete security.

For alternatives, I am not sure what your use-case is but you could create a form in AEM and handle the POST via that form and on whatever external resource you are trying to currently send POST to AEM, include this form as iframe.