diff -urN src.orig/rfc2047.c src/rfc2047.c
--- src.orig/rfc2047.c	Mon Jan  8 12:50:18 2007
+++ src/rfc2047.c	Mon Apr 14 21:10:26 2008
@@ -115,7 +115,7 @@
   continue the loop to search again. We must start just after the initial =?
   because we might have found =?xxx=?xxx?xxx?xxx?=. */
 
-  if ((lencheck && *endptr - mimeword > 73) || *q2ptr - *q1ptr != 2) continue;
+  if ((lencheck && *endptr - mimeword > 148) || *q2ptr - *q1ptr != 2) continue;
 
   /* Get the encoding letter, and decode the data string. */