nnimap and gcc field

[Nicolas Kowalski]

Hello.

I am running gnus 5.10.6 on GNU Emacs, with the nnimap backend. The
IMAP server is Courier-IMAP. When I send a message, I set the "Gcc"
field to "nnimap:INBOX.Sent".

I have noticed that as my folder grows, storing the outgoing message
to this INBOX.Sent folder becomes slower and slower. I set the
imap-log variable to 't' and saw that nnimap reset the \Seen flags on
all messages in this mailbox:

1910 SELECT "INBOX.Sent"
* FLAGS (\Draft \Answered \Flagged \Deleted \Seen \Recent)
* OK [PERMANENTFLAGS (\* \Draft \Answered \Flagged \Deleted \Seen)] Limited
* 3994 EXISTS
* 0 RECENT
* OK [UIDVALIDITY 1101882667] Ok
* OK [MYRIGHTS "acdilrsw"] ACL
1910 OK [READ-WRITE] Ok
1911 UID SEARCH UNSEEN UNDELETED
* SEARCH 3996
1911 OK SEARCH done.
1912 UID SEARCH SEEN
* SEARCH 1 2 3 4 [...sniped...] 3993
1912 OK SEARCH done.
1913 UID SEARCH FLAGGED
* SEARCH
1913 OK SEARCH done.
1914 UID SEARCH ANSWERED
* SEARCH
1914 OK SEARCH done.
1915 UID SEARCH RECENT
* SEARCH
1915 OK SEARCH done.
1916 FETCH 1,* UID
* 1 FETCH (UID 1)
* 3994 FETCH (UID 3996)
1916 OK FETCH completed.
1917 UID STORE 1:3996 +FLAGS (\Seen)
* 1 FETCH (UID 1 FLAGS (\Seen))
* 2 FETCH (UID 2 FLAGS (\Seen))
* 3 FETCH (UID 3 FLAGS (\Seen))
* 4 FETCH (UID 4 FLAGS (\Seen))

[...sniped...]

* 3994 FETCH (UID 3996 FLAGS (\Seen))
1917 OK STORE completed.


Shouldn't nnimap store the \Seen flag only on the newly appended
message ?

Thanks.

-- 
Nicolas