Starting a week after I posted this address, it's gotten 55 spam messages in 81 days. I've also gotten lots of spam to generic addresses (e.g.,
info@yotann.org) and lots of attempts to use my mail server as an open relay.
The spam is mostly SEO ads, with some earn-money-online ads and a few 409 scams and viruses. All but a couple of messages are detected as spam by SpamAssassin (default settings; same results with -L). A plain Bayesian filter should also work well.