March 2018
Intermediate to advanced
626 pages
17h 32m
English
All email protocols use the same concept of sending a command and expecting a response or status code about the command. When the command or request from the client is executed successfully, the server sends a positive status code (such as OK). If there are any issues or a failure in executing the command, it sends a negative response code (such as NO or BAD). More details about the error codes are available in the There's more... section that follows:

Read now
Unlock full access