Somewhere I've got a spam filter that is filtering out too much stuff that I want. I can't figure out where it is.
As far as I can tell, my Dreamhost filters are turned completely off. My domain has a catch-all address, so the Mail -> Anti-Spam control panel won't enable DreamHost's Anti-Spam filter.
On my local machine (a Mac), the Mail control panel has junk mail filtering enabled and set to move all junk mail to the Junk mailbox.
I check the Junk mailbox every couple of days. In the last 30 days, it has accumulated only 35 messages. This is way, way lower than I expected, and it's been that low for at least a few months now.
This is an issue because I've gotten two recent phone calls asking why I hadn't replied to emails. Well, I never got them. I know that other things can cause this, but the undelivered emails combined with the low spam levels make me suspicious that somewhere there's a spam filter going wild.