IMAP port
Port for listening on. Default is 143.
IMAP Enable SSL (Default Port) (Enterprise Edition only)
This will enable SSL certificate encryption for the default port that IMAP is running on. Place a tick in this box to enable the service. This also has to be enabled at a server level under >Server>Localhost Properties>SSL tab.
Also listen on alternate port
An alternate port can be selected.
IMAP Enable SSL (Alternate Port) (Enterprise Edition only)
This will enable SSL certificate encryption for the alternate port that IMAP is running on. The default port number is 993. Place a tick in this box to enable. The service also has to be enabled at a server level under > Server > Localhost Properties >SSL tab.
Client Connections
Select either an unlimited number of client connections, or specify a maximum number of concurrent connections. Specifying a maximum number of connections may reduce server load by limiting the threads that IMAP can use.
Enable public folders (Enterprise Edition only)
Public folders allow one or more mailboxes under the post office to share data (messages in a folder that is seen by all mailboxes in the post office). Anything placed in this folder (Program Files\MailEnable\Post Offices\[Post Office Name]\Pubroot) will become visible to all other mailboxes in the post office. This feature must be enabled for the post office in Post Office Properties.
Enable NTLM authentication
If enabled, then secure authentication between the server and the supported client is enabled. This will allow the server to accept requests from the client to use secure transmissions for the authentication method. The client also has to be enabled use this secure authentication. For example, in Outlook the feature is called SPA – Secure Password Authentication.
Enable CRAM-MD5 authentication
CRAM-MD5 Challenge-Response Authentication Mechanism is intended to provide an authentication extension to IMAP4 that neither transfers passwords in clear text nor requires significant security infrastructure in order to function. Only a hash value of the shared password is ever sent over the network, thus precluding plaintext transmission.
Timeout for idle connections
If this setting is enabled and a client connection has been idle or not passed any commands to the server for the set period of time, the connection will be dropped by the server.
IP Addresses to bind to
It is possible to select the IP addresses that the POP service will be bound to. On a multi-homed machine it may be desirable to only allow connections on particular IP addresses. ‘Always bind all IPs’ will allow connections on all IP addresses that are configured for the machine.