diff --git a/member-parser.scm b/member-parser.scm
index 0c87410..a1cd656 100644
--- a/member-parser.scm
+++ b/member-parser.scm
@@ -44,11 +44,13 @@
 	 utils
 	 configuration)
 
- ;; Pass 2: known keys and multikeys
+ ;; Pass 2: known keys
  (define mandatory-keys '(nick name mail phone))
  (define optional-keys '(born joined destroyed))
- (define known-keys (append mandatory-keys optional-keys))
  (define known-multikeys '(card desfire credit studentstart studentstop suspendstart suspendstop))
+ (define ignored-keys '(mail2))
+
+ (define known-keys (append mandatory-keys optional-keys))
 
  ;; Pass 3: Interpreter passes
  (define member-schema-interpreters
@@ -204,7 +206,9 @@
 			 (dict-set processed key (cons (cons value number)
 						       (dict-ref processed key '()))))
 		   (loop (cdr parsed)
-			 (member-record-add-highlight mr number "Unknown key" 2 'warning)
+			 (if (member key ignored-keys)
+			     mr
+			     (member-record-add-highlight mr number "Unknown key" 2 'warning))
 			 processed)))))))
 
  ;; Pass 3+: Single interpreter pass - input must be