Sets permitted methods of authentication for IMAP clients. Supported methods are:
Allows to specify the
extensions list to be passed to the client upon
It makes sense to specify extensions supported by IMAP backends to which clients are proxied (if this extensions are related to commands used after the authentication, when nginx transparently proxies the client connection to the backend).
The current list of standardized extensions is published at the www.iana.org.
Sets the IMAP commands read buffer size. By default, the buffer size is equal to one memory page. This is either 4K or 8K, depending on a platform.