The AS2 component treats headers case-sensitive according to the switch case enum's. According to the RFC this should be case-insensitive: https://tools.ietf.org/html/rfc7230#section-3.2
Headers should be treated case insensitive.
This happens at:
in the method: parseMultipartSignedEntityBody
at line: 487. Specifically the following lines:
lines: 523,526 and in the switch block that follows