https://bugs.exim.org/show_bug.cgi?id=3153
Bug ID: 3153
Summary: RFC 8058 says that we must DKIM sign
List-Unsubscribe-Post
Product: Exim
Version: N/A
Hardware: All
OS: All
Status: NEW
Severity: bug
Priority: medium
Component: DKIM
Assignee: [email protected]
Reporter: [email protected]
CC: [email protected]
RFC 8058 "Signaling One-Click Functionality for List Email Headers"
section 4 https://www.rfc-editor.org/rfc/rfc8058#section-4
mandates:
Additional Requirements
The message needs at least one valid authentication identifier. In
this version of the specification, the only supported identifier type
is DKIM [RFC6376]. Hence, senders MUST apply at least one valid DKIM
signature to the message.
The List-Unsubscribe and List-Unsubscribe-Post headers MUST be
covered by the signature and included in the "h=" tag of a valid
DKIM-Signature header field.
If the message does not have the required DKIM signature, the mail
receiver SHOULD NOT offer a one-click unsubscribe for that message.
The exim defaults PDKIM_DEFAULT_SIGN_HEADERS and PDKIM_OVERSIGN_HEADERS
include List-Unsubscribe List-Subscribe and List-Post,
but not List-Unsubscribe-Post :-(
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