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-rw-r--r--Documentation/lei-mail-formats.pod5
1 files changed, 4 insertions, 1 deletions
diff --git a/Documentation/lei-mail-formats.pod b/Documentation/lei-mail-formats.pod
index 3c37c880..930c5d76 100644
--- a/Documentation/lei-mail-formats.pod
+++ b/Documentation/lei-mail-formats.pod
@@ -96,7 +96,10 @@ it worth supporting.
 
 Depending on the IMAP server software and configuration, IMAP
 servers may use any (or combination) of the aforementioned
-formats or a non-standard database backend.
+formats or a non-standard database backend.  Currently, lei
+uses L<Mail::IMAPClient> which has acceptable performance
+over low-latency links.  Performance over high-latency links
+is currently poor.
 
 =head1 eml