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-rw-r--r--pullimap.md11
1 files changed, 8 insertions, 3 deletions
diff --git a/pullimap.md b/pullimap.md
index cb2a07a..3e8aae3 100644
--- a/pullimap.md
+++ b/pullimap.md
@@ -121,9 +121,10 @@ Valid options are:
the IMAP server. (The value is at best 24h accurate due to the IMAP
`SEARCH` criterion ignoring time and timezone.)
If *purge-after* is set to `0` then messages are deleted immediately
- after delivery. Otherwise `pullimap` issues an IMAP `SEARCH`
- command to list old messages; if `--idle` is set then the `SEARCH`
- command is issued again every 12 hours.
+ after delivery. Otherwise `pullimap` issues an IMAP `SEARCH` (or
+ extended `SEARCH` on server advertizing the [`ESEARCH`][RFC 4731]
+ capability) command to list old messages; if `--idle` is set then
+ the `SEARCH` command is issued again every 12 hours.
*type*
@@ -339,6 +340,9 @@ Standards
[RFC 4315], December 2005.
* A. Gulbrandsen, _The IMAP `COMPRESS` Extension_,
[RFC 4978], August 2007.
+ * A. Melnikov and D. Cridland, _IMAP4 Extension to SEARCH Command for
+ Controlling What Kind of Information Is Returned_,
+ [RFC 4731], November 2006.
* R. Siemborski and A. Gulbrandsen, _IMAP Extension for Simple
Authentication and Security Layer (SASL) Initial Client Response_,
[RFC 4959], September 2007.
@@ -358,6 +362,7 @@ Standards
[RFC 4978]: https://tools.ietf.org/html/rfc4978
[RFC 1928]: https://tools.ietf.org/html/rfc1928
[RFC 1929]: https://tools.ietf.org/html/rfc1929
+[RFC 4731]: https://tools.ietf.org/html/rfc4731
[INI file]: https://en.wikipedia.org/wiki/INI_file
[`fetchmail`(1)]: http://www.fetchmail.info/