It's off-the-shelf MHonArc[1]. If implementing a decent mailing list archive were a prerequisite to launching a business, no business would ever be launched.

It's off-the-shelf MHonArc[1]. If implementing a decent mailing list archive were a prerequisite to launching a business, no business would ever be launched. [1]: https://www.mhonarc.org/ https://www.mhonarc.org/