What Did I Do?

I had previously introduced OpenDKIM in my notes when Notes on Adding OpenDKIM to Postfix + DMAR, but I wanted to support ARC signatures as well, so I switched to arcmilter.

arcmilter is a milter designed for performing ARC signatures, but it can also handle DKIM signatures.
arcmilter is written in Go.

I should clarify, I wrote it myself… right?

You can find arcmilter in the following repository:

github.com/masa23/arcmilter

RPM and DEB packages are available in the Releases section, so you can use those or build from the source.

I think it’s fine since the essential information is already included in the basic README.
There is also a README.ja.md available, so please refer to that as well.

So?

For those who are fearless, please give it a try.

I intended to comply with RFC6376 and RFC8617, but
the testing may be insufficient, so if you find any bugs, please feel free to send a PR.

That’s all.