Unescaped left brace in regex is deprecated here - Amavisd-new-2.11.0 & Amavisd-new-2.11.1
Starting Amavisd-new daemon: OK Unescaped left brace in regex is deprecated here (and will be fatal in Perl 5.32), passed through in regex; marked by <-- HERE in m/ ( { <-- HERE } (?: / * )? | * ) / at (eval 98) line 830.
Line 830 needs 2 braces.