* IM/Pop.pm (pop_open): Don't allow non-ASCII characters for APOP timestamp.
  [CVE-2007-1558]

--- im-148/IM/Pop.pm	2005-03-08 06:28:24.000000000 +0900
+++ im-149/IM/Pop.pm	2007-04-23 20:57:04.000000000 +0900
@@ -98,7 +98,7 @@
 	    return -1;
 	}
     } elsif ($auth eq 'APOP') {
-	if ($resp !~ /^\+.*(<.+>)/i) {
+	if ($resp !~ /^\+.*(<[=!-;?-~]+\@[=!-;?-~]+>)/) {
 	    im_err("APOP is not supported by the server.\n");
 	    return -1;
 	}