On Sun, Sep 07, 2025 at 04:48:16PM -0500, Tim Chase wrote: > Is there a proper way to create a filter that would catch an address if > it was in the To:, CC:, BCC:, Envelope-To or Delivered-To: header? > > I see that ~h can be used for matching *any* header, but I was hoping > for recipient-y headers only.
It would be cool if there was a builtin filter that matched that; absent that, though, you an use regex within the filter to do that, e.g., ~h "^(Envelope|X-Original|Delivered)-To: foo@example\.org" You won't be able to filter on BCC directly, so whether you can infer it via X-Original-To or similar depends on your MTA's configuration. HTH. /w
