Google Group works slightly differently. They "forward" emails using the group's email address as the "From" address, not the original sender's email address, unless the sender address happen to be a Google mail address (including Gmail and others). Technically speaking, that's not forwarding, but sending a new email with the original email's content, subject, sender name (but not address), etc. information copied over.

I believe the mailing list software this mailing list is using also supports such feature. For example, this email's "From" address is "Bowen Song via dev <dev@cassandra.apache.org>", not my actual email address (which is the "Cc" address). If we add the footer to all emails, all "From" addresses, other than those Apache email addresses (e.g. f...@apache.org), will have to be turned into "dev@cassandra.apache.org". This works, but there's a catch. Many people (habitually) hits the "reply all" button on their mail client instead of the "reply" button, and as a result of that, the person being replied to will receive two nearly identical emails, one addressed to the mailing list which is then modified to added the footer, and the other Cc-ed to them without the footer. This may turn out to be very annoying if a mailing list participant can't (or doesn't know how to) setup inbox rules to filter these out.

There's no "Prefect Solution™", unsurprisingly.


On 22/01/2024 19:08, C. Scott Andreas wrote:
Bowen and Jeremiah, thanks for remembering this.

I'd remembered the DKIM/SPF issue, but not its relationship to the message footer - appreciate your work fixing that, Bowen.

I'm part of a few Google Groups that relay messages with an appended footer that don't seem to encounter invalidation, but am not curious enough to learn how they make that work right now. :)

I withdraw the proposal. 👍

– Scott

On Jan 22, 2024, at 10:56 AM, Brandon Williams <dri...@gmail.com> wrote:


That's right, I'd forgotten about this.  I change my +1 to -1, there's not enough value in this to break signatures.

Kind Regards,
Brandon


On Mon, Jan 22, 2024 at 12:42 PM Jeremiah Jordan <jerem...@datastax.com> wrote:


    Here was the thread where it was removed:
    lists.apache.org
    <https://lists.apache.org/thread/9wtw9m4r858xdm78krf1z74q3krc27st>
        favicon.ico
    <https://lists.apache.org/thread/9wtw9m4r858xdm78krf1z74q3krc27st>


    On Jan 22, 2024, at 12:37 PM, J. D. Jordan
    <jeremiah.jor...@gmail.com> wrote:
    I think we used to have this and removed them because it was
    breaking the encryption signature on messages or something which
    meant they were very likely to be treated as spam?

    Not saying we can’t put it back on, but it was removed for good
    reasons from what I recall.

    On Jan 22, 2024, at 12:19 PM, Brandon Williams
    <dri...@gmail.com> wrote:

    +1

    Kind Regards,
    Brandon

    On Mon, Jan 22, 2024 at 12:10 PM C. Scott Andreas
    <sc...@paradoxica.net> wrote:

    Hi all,

    I'd like to propose appending the following two footers to
    messages sent to the user@ and dev@ lists. The proposed
    postscript including line breaks is between the "XXXXX" blocks
    below.

    User List Footer:
    XXXXX

    ---
    Unsubscribe: Send a blank email to
    user-unsubscr...@cassandra.apache.org. Do not reply to this
    message.
    Cassandra Community: Follow other mailing lists or join us in
    Slack: https://cassandra.apache.org/_/community.html
    XXXXX

    Dev List Footer:
    XXXXX

    ---
    Unsubscribe: Send a blank email to
    dev-unsubscr...@cassandra.apache.org. Do not reply to this
    message.
    Cassandra Community: Follow other mailing lists or join us in
    Slack: https://cassandra.apache.org/_/community.html
    XXXXX

    Offering this proposal for three reasons:
    – Many users are sending "Unsubscribe" messages to the full
    mailing list which prompts others to wish to unsubscribe – a
    negative cascade that affects the size of our user community.
    – Many users don't know where to go to figure out how to
    unsubscribe, especially if they'd joined many years ago.
    – Nearly all mailing lists provide a one-click mechanism for
    unsubscribing or built-in mail client integration to do so via
    message headers. Including compact instructions on how to
    leave is valuable to subscribers.

    #asfinfra indicates that such footers can be appended given
    project consensus and an INFRA- ticket:
    https://the-asf.slack.com/archives/CBX4TSBQ8/p1705939868631079

    If we reach consensus on adding a message footer, I'll file an
    INFRA ticket with a link to this thread.

    Thanks,

    – Scott

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