Sets permitted methods of authentication for IMAP clients. Supported methods are:
- AUTH=CRAM-MD5. In order for this method to work, the password must be stored unencrypted.
- AUTH=EXTERNAL (1.11.6).
imap_capabilities IMAP4 IMAP4rev1 UIDPLUS;
extensions list that is passed to the client in response to
The authentication methods specified in the imap_auth directive and
are automatically added to this list depending on the
starttls directive value.
It makes sense to specify the extensions supported by the IMAP backends to which the clients are proxied (if these extensions are related to commands used after the authentication, when nginx transparently proxies a client connection to the backend).
The current list of standardized extensions is published at www.iana.org.
size of the buffer used for reading IMAP commands.
By default, the buffer size is equal to one memory page.
This is either 4K or 8K, depending on a platform.