Added imaplib.
diff --git a/Doc/lib/libundoc.tex b/Doc/lib/libundoc.tex
index ae94a97..b7daaf3 100644
--- a/Doc/lib/libundoc.tex
+++ b/Doc/lib/libundoc.tex
@@ -36,6 +36,9 @@
 \section{Stuff useful to a lot of people, including the CGI crowd}
 
 \begin{description}
+\item[imaplib.py]
+--- IMAP4 client class by Pier Lauder.
+
 \item[MimeWriter.py]
 --- Generic MIME writer