Capability Option

Updated in release: 8.0

The  IMAP Proxy option specifies the capability replacement string. The MMP will use the string you specify for  instead of its default (own) capability to tell IMAP clients what it (or the servers behind it) can do. This variable has no effect in POP3. There is no need to include STARTTLS and AUTH= extensions as they are added automatically based on the other relevant MMP configuration settings.

There is no need to adjust this string if the backend IMAP servers are entirely from the same version of the Messaging Server installer. Otherwise, it is important to specify a capability list that includes only the features supported by all the backend IMAP servers. The appropriate string can be determined by telnetting to port 143 on each kind of backend server and entering the command. Then list only the capabilities present on all backend IMAP servers.

The default value is: IMAP4rev1 ACL RIGHTS=tekx QUOTA LITERAL+ NAMESPACE UIDPLUS CHILDREN BINARY UNSELECT SORT CATENATE URLAUTH ESEARCH ESORT THREAD=ORDEREDSUBJECT THREAD=REFERENCES ENABLE CONDSTORE QRESYNC CONTEXT=SEARCH CONTEXT=SORT WITHIN SASL-IR SEARCHRES METADATA ID LIST-STATUS SPECIAL-USE CREATE-SPECIAL-USE ANNOTATE-EXPERIMENT-1 MULTISEARCH IDLE

See also:
 * MMP and IMAP Proxy and POP Proxy and vdomain options