Date: Fri, 23 Jul 2018 20:31:47 +0200
From: Foo <foo@foo.example>
Message-ID: <2018-07-23%foo@foo.example>
Newsgroups: foo.bar
Path: server.example!.POSTED!not-for-mail
X-Cancel-Lock: (must be ignored) sha1:uvw
Cancel-Lock-X: (must be ignored) sha1:xyz
caNcel-LOCK: (Comment with quoted-pair: \(, (Not scheme sha1:))
 sha256:RrKLp7YCQc9T8HmgSbxwIDlnCDWsgy1awqtiDuhedRo=(sha1:abc)
Subject: Test with prefix and suffix in field name

Content
