I’ve used Subversion very occasionally since 2009, and SVN::Notify at all. Over the years, I’ve fixed minor issues with it now and then, and made the a couple of releases to address issues fixed by others. But it’s past the point where I feel qualified to maintain it. Hell, the repository for SVN::Notify has been hosted on GitHub ever since 2011. I don’t have an instance of Subversion against which to test it; nor do I have any SMTP servers to throw test messages at.
In short, it’s past time I relinquished maintenance of this module to someone with a vested interest in its continued use. Is that you? Do you need to keep SVN::Notify running for your projects, and have a few TUITs to fix the occasional bug or security issue? If so, drop me a line (david @ this domain). I’d be happy to transfer the repository.