note to anyone who runs their own mail server

If you run your own mail server (or know someone who does) you might point out to them that the DSBL blacklist is currently blacklisting parts of gmail. I can’t comment on what gmail may or may not be going to deserve being blacklisted; I can only comment that whoever you are, you almost certainly have friends using gmail who are going to be blacklisted too. So, yaknow, you probably want to stop using DSBL, at least until they fix this.