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-rw-r--r--fetchmail.man12
1 files changed, 10 insertions, 2 deletions
diff --git a/fetchmail.man b/fetchmail.man
index 487eb7b9..c2f618af 100644
--- a/fetchmail.man
+++ b/fetchmail.man
@@ -612,8 +612,16 @@ Running more than one concurrent instance of
on the same mailbox may cause messages to be lost or remain unfetched.
(This is a design problem of the POP2, POP3 and IMAP2bis protocols.)
.PP
-The RPOP support, and the UIDL support for RFC1725-compliant POP servers
-without LAST, are not yet well tested.
+If, using POP3, you find that messages you've already read on the
+server are being fetched, blame RFC1725. That late version pf the
+POP3 protocol specification ill-advisedly removed the LAST command, and
+some servers (including the one distributed with at least some
+versions of SunOS) follow it (you can verify this by invoking
+.I fetchmail -v
+and watching the response to LAST early in the query). The fix is to
+install an older POP3 server with LAST or switch to an IMAP server.
+.PP
+The RPOP support is not yet well tested.
.PP
Send comments, bug reports, gripes, and the like to Eric S. Raymond
<esr@thyrsus.com>.