Simon Backx c8f71e8504 Added list-unsubscribe feature flag and header (#18736) ... refs https://github.com/TryGhost/Product/issues/4053 This adds the feature flag. If enabled, the list-unsubscribe header should be set. The value currently is only for testing purposes and probably won't work yet.		2023-10-24 10:35:47 +00:00
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MailgunClient.js	Added list-unsubscribe feature flag and header (#18736)	2023-10-24 10:35:47 +00:00