diff --git a/src/mail/ngx_mail_pop3_handler.c b/src/mail/ngx_mail_pop3_handler.c
index aed662919..d22ba5ebf 100644
--- a/src/mail/ngx_mail_pop3_handler.c
+++ b/src/mail/ngx_mail_pop3_handler.c
@@ -188,7 +188,6 @@ ngx_mail_pop3_auth_state(ngx_event_t *rev)
 
             default:
                 rc = NGX_MAIL_PARSE_INVALID_COMMAND;
-                s->mail_state = ngx_pop3_start;
                 break;
             }
 
@@ -215,7 +214,6 @@ ngx_mail_pop3_auth_state(ngx_event_t *rev)
 
             default:
                 rc = NGX_MAIL_PARSE_INVALID_COMMAND;
-                s->mail_state = ngx_pop3_start;
                 break;
             }
 
diff --git a/src/mail/ngx_mail_proxy_module.c b/src/mail/ngx_mail_proxy_module.c
index b408ed7d3..3a9a6bec5 100644
--- a/src/mail/ngx_mail_proxy_module.c
+++ b/src/mail/ngx_mail_proxy_module.c
@@ -726,7 +726,7 @@ ngx_mail_proxy_read_response(ngx_mail_session_t *s, ngx_uint_t state)
 
     b->last += n;
 
-    if (b->last - b->pos < 5) {
+    if (b->last - b->pos < 4) {
         return NGX_AGAIN;
     }