$OpenBSD: patch-libsylph_smtp_h,v 1.2 2007/11/06 21:18:10 rui Exp $
--- libsylph/smtp.h.orig	Tue Nov 21 05:51:33 2006
+++ libsylph/smtp.h	Fri Nov  2 15:06:59 2007
@@ -33,7 +33,9 @@ typedef struct _SMTPSession	SMTPSession;
 
 #define SMTP_SESSION(obj)	((SMTPSession *)obj)
 
-#define MSGBUFSIZE		8192
+#ifndef MSGBUFSIZE
+#  define MSGBUFSIZE		8192
+#endif
 
 typedef enum
 {
