ZCS Administrator Guide 8.0
ZCS Administrator Guide 8.0
Open Source Edition


Appendix A Command-Line Utilities > Changing Conversations Thread Default

Changing Conversations Thread Default
Messages can be grouped into conversations by a common thread. The default is to thread messages in a conversation by the References header. If there is no References header, the Subject is used to determine the conversation thread. The default options can be changed from the COS or for individual accounts.
zmprov mc [cosname] zimbraMailThreadingAlgorithm [type]
The types include:
*
none. no conversation threading is performed.
*
subject. the message will be threaded based solely on its normalized subject.
*
strict. only the threading message headers (References, In-Reply-To, Message-ID, and Resent-Message-ID) are used to correlate messages. No checking of normalized subjects is performed.
*
references. the same logic as "strict" with the constraints slightly altered so that the non-standard Thread-Index header is considered when threading messages and that a reply message lacking References and In-Reply-To headers will fall back to using subject-based threading.
*
subjrefs. the same logic as "references" with the further caveat that changes in the normalized subject will break a thread in two.
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