So, it seems that the way I interact with my blog (cloning the Git repository that backs it and then looking at that on my local PC) doesn't show me comments. As a result, I've been completely ignoring all comments for years. Somewhat surprisingly, the backlog was only 226 comments. Less surprisingly, all but one were spam. I'll have to stay on top of this in the future.
On a related note, I'm planning on revamping my entire online presence. I'm thinking I'll use ikiwiki for the main web site, although I'm not sure I'll still use it for the blog. I also want to migrate to a fresh Linode so I can take advantage of the full amount of disk space they give me (Linode upgraded my disk space a while back, but I never got around to using all of it, in part because resizing filesystems makes me nervous). In doing so, I can upgrade to Debian 7 and get rid of a lot of cruft that accumulated over the years (like the Exim configuration files). I might also do webmail, too. Additionally, I plan to revamp my email configuration so that any email with a .exe attachment gets silently dropped, as opposed to the current state where it gets quarantined and I get an annoying notification email about it. On a related note, I DO NOT RUN A BUSINESS, AND EVEN IF I DID, I SURE AS HELL WOULDN'T OPEN AN ATTACHMENT CALLED bank_docs.exe, YOU DUMBASS PHISHERS! So, if you are the sort of person to send Windows executables for non-nefarious purposes, don't bother sending one to me. I will ignore it today, and I won't even receive it tomorrow.
I'm not quite sure how I'll handle the transition, but I guess the ability to have multiple MX records will smooth things out on the mail side.