path: root/doc/interimap.1.md
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Diffstat (limited to 'doc/interimap.1.md')
1 files changed, 4 insertions, 1 deletions
diff --git a/doc/interimap.1.md b/doc/interimap.1.md
index 387850a..d7c3711 100644
--- a/doc/interimap.1.md
+++ b/doc/interimap.1.md
@@ -266,7 +266,10 @@ Valid options are:
: An optional Perl Compatible Regular Expressions ([PCRE]) covering
mailboxes to exclude: any ([UTF-7 encoded][RFC 2152] and unquoted)
mailbox listed in the initial `LIST` responses is ignored if it
- matches the given expression.
+ matches the given expression after trimming the reference names and
+ substituting the hiearchy delimiter with the null character. For
+ instance, specifying `^virtual(?:\x00|$)` excludes the mailbox named
+ “virtual” as well as its descendants.
Note that the *MAILBOX*es given as command-line arguments bypass the
check and are always considered for synchronization. This option is
only available in the default section.