Just to clarify - Do you mean from Proofpoint enterprise (PoD) customers or Proofpoint essentials? I could definitely see essentials having this problem as their IP space is shared amongst customers, but PoD clusters each individually have their own IPs that are separate from any other customer.

On 1/17/2023 8:15 AM, Jeff via mailop wrote:
We too have been seeing this in the last 48 hours

Only from clients sending out from Proofpoint though.... and Google is marking them as Spam for the reason "Blatant Spam"... when they are clearly not

We have tickets open with all relevant providers (Proofpoint and Google) to see if we can figure this out

On Tue, Jan 17, 2023 at 9:10 AM Jaroslaw Rafa via mailop <mailop@mailop.org> wrote:

    Dnia 17.01.2023 o godz. 13:16:03 Paul Gregg via mailop pisze:
    > Heads up in case anyone else is experiencing this.
    >
    > We are aware of a recent change in behaviour of gmail.com
    <http://gmail.com> where
    > most email is placed directly into Spam folder.
    >
    > So far we have dozens of customers reporting this.
    > Tested myself with full SPF, DKIM and DMARC with p=reject -
    which gmail
    > itself marks as passing all tests. The mail was also delivered
    over TLS.
    > Mails go to Spam.
    >
    > We're trying to reach out to google, but so far have no response.
    >
    > We don't think it is just 'us', as reddit r/msp has others reporting
    > same from O365 direct to gmail.

    Welcome to the club :(

    I'm experiencing this for over 2 years. Have written about this on
    this very
    list a few times. Google just suddenly stopped to "like" my
    domain. I had
    no SPF, DKIM nor DMARC at that time (despite this I didn't have any
    deliverability problem, including Google). After Google changed
    something
    and started to spam-mark my mail I implemented SPF/DKIM/DMARC
    (outgoing
    only, I don't want to bother with checking this crap on incoming
    mail).
    Everything passes at Google, but it doesn't help.

    However, when I send from exactly the same server, using exactly
    the same
    mail client, only with diferent sender domain, the mails go
    through. So I
    know it's the domain Google doesn't like.

    Nothing helps - even when the recipient at Gmail flags my mail as
    non-spam,
    it can happen that next messages from me still go to spam. Even
    when I REPLY
    (!) to a mail I got from a Gmail user, my reply goes to spam, which is
    completely illogical. It should be obvious for Google to detect
    that this is
    a reply to a message that was previously sent from Gmail.

    I have filled in the "sender troubleshooting form" on Google website
    multiple times (you need to provide headers from receiving side of
    the mail
    that was misclassified as spam, so I made myself a test account at
    Gmail
    that I am sending messages to) - however they state in advance
    that they
    won't contact you and inform you whether they did anything or not
    to your
    complaint. Looks like they didn't do anything. I managed to reach
    Brandon
    from Google via this very list, but he said that it just works so
    and from
    their point of view they don't see any reason to change anything.
    I just
    happen to have a domain whose parent domain has a "poor
    reputation" and I
    have to accept it.

    I even made a blog post about it some time ago, but it's in my
    language (ie.
    Polish). After that post I was contacted by some other people who are
    unlucky to be in the same situation.

    Shame on you Google.
-- Regards,
       Jaroslaw Rafa
    r...@rafa.eu.org
    --
    "In a million years, when kids go to school, they're gonna know:
    once there
    was a Hushpuppy, and she lived with her daddy in the Bathtub."
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