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Pardon the header bloat -- we've added ARC signing to all our mailing list messages in order to appease Gmail's new requirements.

https://support.google.com/mail/answer/81126#zippy=%2Crequirements-for-sending-or-more-messages-per-day
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Still nothing compared to the bajillion X-MS-* headers set by outlook.
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@monsieuricon What do you use for ARC signing?

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@monsieuricon “Keep spam rates reported in Postmaster Tools below 0.10% and avoid ever reaching a spam rate of 0.30% or higher.” Does that mean one strike and you are out? One compromised end user sending 5000 emails in a day and you no longer exist for google ??

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