1 files changed, 9 insertions, 0 deletions

diff --git a/conf.d/020_acl.conf b/conf.d/020_acl.conf
index 1014dd1..5ed0fa7 100644
--- a/conf.d/020_acl.conf
+++ b/conf.d/020_acl.conf
@@ -66,6 +66,12 @@ acl_mua_rcpt:
 
 
 acl_mua_data:
+  require  verify        = header_names_ascii
+           message       = Invalid character in header name.
+
+  require  verify        = header_syntax
+           message       = Syntax error in header.
+
   require  acl           = acl_check_alias ${address:$h_from:} $authenticated_id
            message       = Header address mismatch: $authenticated_id is not authorized to use ${address:$h_from:}.
 
@@ -146,6 +152,9 @@ acl_mta_data:
   deny     condition     = ${if > {$max_received_linelength}{998}}
            set acl_m_msg = Maximum allowed line length is 998 octets, got $max_received_linelength.
 
+  require  verify        = header_syntax
+           message       = Syntax error in header.
+
   warn     condition     = SCAN_SPAM
            spam          = nobody:true/defer_ok
            remove_header = x-spam-bar : x-spam-score : x-spam-report : x-spam-status