--- imap.c.org	Sat Dec 11 11:57:04 1999
+++ imap.c	Sat Dec 11 12:31:38 1999
@@ -107,6 +107,8 @@
 	}
 	if (strstr(buf, "FLAGS"))
 	    seen = (strstr(buf, "SEEN") != (char *)NULL);
+	if (strstr(buf, "PREAUTH"))
+	    preauth = TRUE;
     } while
 	(tag[0] != '\0' && strncmp(buf, tag, strlen(tag)));