Hi, mhbuild(1)'s `-check' adds a `Content-MD5' header to each part. Consider it's run by whatnow(1) due to `mime', and that's followed by an `edit', allowing the user to actually edit what's covered by the digest.
I think the addition of `Content-MD5' should be in the outgoing pipeline once the content is committed, so presumably post(8) as everything passes through that? -- Cheers, Ralph. https://plus.google.com/+RalphCorderoy -- nmh-workers https://lists.nongnu.org/mailman/listinfo/nmh-workers