From: Jani Nikula <jani@nikula.org>
Date: Tue, 27 Sep 2016 10:11:37 +0000 (+0300)
Subject: faq: how do I search for the list-id: header
X-Git-Url: https://git.cworth.org/git?p=notmuch-wiki;a=commitdiff_plain;h=a366fdfc129df3c1dd54150145559d1a621632dc

faq: how do I search for the list-id: header
---

diff --git a/faq.mdwn b/faq.mdwn
index bb0efaa..1741288 100644
--- a/faq.mdwn
+++ b/faq.mdwn
@@ -53,3 +53,18 @@ searches. Punctuation is mostly ignored.
 
 The boolean prefix searches (see Boolean and Probabilistic Prefixes in the man
 page), such as tag: or path: searches, need an exact match.
+
+## How do I search for the `List-Id:` header?
+
+Currently there is no way to search for `List-Id:`. As a workaround, try using a
+`to:` prefix search (which covers both `To:` and `Cc:` headers) on the mailing
+list address.
+
+Limitations in the duplicate message handling are the main reason for not
+indexing the `List-Id:` header. If you receive the same message via both the
+list and directly (by way of `To:` or `Cc:`), only the first message encountered
+will be indexed. Only the message received via the list will have `List-Id:`,
+but you would expect a `List-Id:` search to find the message, regardless of the
+order in which the duplicates were received. This is a more general problem than
+just `List-Id:`, and once this has been resolved, adding `List-Id:` indexing is
+trivial.