Authcachesize Option
From MsgServerDocWiki
The Messaging Server can cache the results of successful LDAP authentication (e.g., when logging into IMAP, POP or SMTP or when the MMP has preauth enabled). The authcachesize option defines the number of authentication cache entries. A higher setting for authcachesize improves performance while using more memory. A lower setting reduces performance and reduces the amount of memory used.
The default value is: 10000
Use with base
The maximum number of concurrent users/entries in the cache.
The default value in this context is: 10000
