diff --git a/scripts/nextcloud-mail-sync.sh b/scripts/nextcloud-mail-sync.sh
index 1d64685..2efe58a 100755
--- a/scripts/nextcloud-mail-sync.sh
+++ b/scripts/nextcloud-mail-sync.sh
@@ -33,7 +33,8 @@ list_mail_accounts() {
       next;
     }
     id != "" && /@/ {
-      if (match($0, /[A-Za-z0-9._%+-]+@[A-Za-z0-9.-]+\.[A-Za-z]{2,}/)) {
+      # Keep the regex simple (mawk doesn't support interval expressions like {2,}).
+      if (match($0, /[A-Za-z0-9._%+-]+@[A-Za-z0-9.-]+/)) {
         printf("%s\t%s\n", id, substr($0, RSTART, RLENGTH));
         id="";
       }