--- a/src/mail/ngx_mail.h
+++ b/src/mail/ngx_mail.h
@@ -140,6 +140,7 @@ typedef enum {
     ngx_smtp_helo_from,
     ngx_smtp_xclient,
     ngx_smtp_xclient_from,
+    ngx_smtp_xclient_helo,
     ngx_smtp_from,
     ngx_smtp_to
 } ngx_smtp_state_e;
@@ -258,12 +259,12 @@ typedef struct {
 #define NGX_SMTP_STARTTLS      13
 
 
-#define NGX_MAIL_AUTH_PLAIN           0
-#define NGX_MAIL_AUTH_LOGIN           1
-#define NGX_MAIL_AUTH_APOP            2
-#define NGX_MAIL_AUTH_CRAM_MD5        3
-#define NGX_MAIL_AUTH_NONE            4
-#define NGX_MAIL_AUTH_LOGIN_USERNAME  5
+#define NGX_MAIL_AUTH_PLAIN             0
+#define NGX_MAIL_AUTH_LOGIN             1
+#define NGX_MAIL_AUTH_LOGIN_USERNAME    2
+#define NGX_MAIL_AUTH_APOP              3
+#define NGX_MAIL_AUTH_CRAM_MD5          4
+#define NGX_MAIL_AUTH_NONE              5
 
 
 #define NGX_MAIL_AUTH_PLAIN_ENABLED     0x0002