On Thu, Aug 21, 2025 at 11:32 AM Russell Clemings <[email protected]> wrote:
> OK, so sending an email to my Yahoo address from Thunderbird, using my > Comcast account and a spoofed "from" header matching my alias domain, works > just fine. Sending from Gmail to Yahoo with the same "from" field is > rejected. I guess that narrows it down some. It also makes my head hurt. > Comcast should not allow you to send emails with non-confirmed email addresses or domains they don't control. You should assume that this will stop working at some point. -- Marcel
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