Sets size of the buffer used for proxying. The buffer size is equal to one memory page by default. Depending on a platform, this is either 4K or 8K.
Defines whether to pass the error message obtained during an authentication on the backend to the client.
Usually, if the authentication in nginx was successful, backend can’t return an error, but if it nonetheless exists, this means there is some problem inside. In such cases the backend message can contain the information that should not be shown to the client. However responding with an error for the correct password is a normal behavior of some POP3 servers. For example, CommuniGatePro informs user about mailbox overflow or other events by periodically outputting the authentication error. The directive should be enabled in this case.
Defines a timeout used after the proxying to the backend had started.
Enables or disables issuing of the
XCLIENT PROTO=ESMTP HELO=client_hello ADDR=192.168.1.1 LOGIN=good_user NAME=[UNAVAILABLE]
If the client upon a connection to nginx issued the