My email server is configured such that email to ry4an-anything@ry4an.org gets correctly delivered to me. The dash and whatever is after it are retained but ignored completely.

When I give an email address to a company, say Northwest Airlines,I'll give them an email address that shows to whom it was given, say ry4an``-nwa``@ry4an.org. By doing this I'm able to check which companies are giving/selling/leaking my email address to spammers. Some of the leaks are surprising -- just a few weeks after giving out ry4an-philmont for the first time, giving it to the Boy Scouts, I started getting porn spam on it. When I called to let them know about the leak they assured me it was impossible.

Since this post I've upgraded my mailman installation to a newer version, which allows me to automatically reject messages from non-subscribers without having to resort to external scripting.

However, some of the mailing lists I run are subscribed to by a significant number of members who can't be counted on to post from the email address with which they subscribed, or indeed to even understand what that means. For those lists a policy that automatically rejects messages from non-members is just too draconion. Unfortunately, that means the few spam messages a day from non-members which make it past my filters but would normally be automatically rejected due to their non-member origins have be manually discarded so that I can approve the few non-member messages per month that really do belong on the list.

Earlier this month some friends and I hiked across Isle Royale in lake Superior. Joe kept his GPS running and produced good track points in an odd export format from his Mac software called "Topo". I created a quick conversion script to produce this GPS format data which can be used with the GPS visualizer website to produce images like this:

When editing source files checked out from CVS I sometimes want to prevent them from going back in to source control without further edits. Until now I've just used // FIXME comments and have tried to remember to grep for FIXMEs before committing the files back.

Problem is others use FIXME comments, and sometimes I forget to grep. So I've tweaked our CVSROOT files to prevent custom FIXME tags from going in to source control.

For years I've been using garble to pull track and way point data off of my Garmin eTrex GPS. Unfortunately it produces data in a completely non-standard format. In the past I've written a little custom software to turn the garble data into maps.

Now I'm using http://gpsvisualizer.com to produce much nicer maps, but it takes data in the superior GPX format. The GPSBabel software will pull way point data off of Garmin GPSs and puts them into GPX, but it doesn't handle tracks.

Approval voting is an alternate voting system that has many benefits as compared to Instant Run-Off Voting. For years I've been running the on-line officer elections for the local campus chapter of the Association of Computing Machinery. Last year I talked them into switching to approval voting (even though it probably violates their charter), and it worked really well. Their elections have kicked off again, and once again I'm hosting them and using my voting script.

I wrote an article that got posted on the O'Reilly Network. It sounds a little more huckster-ish than I'd like, but the tech does get explained pretty well. There's a link to the new beta 2 release of SwarmStream Public Edition at the bottom of the article.

When writing I frequently find myself searching backward, either visually or using a reverse-find, to see if I've previously used the word that I've just used. Some words, say furthermore for example, just can't show up more than once per paragraph or two without looking overused.

I was thinking that if my editor/word-processor had a feature wherein all instances of the word I just typed were briefly highlighted it would allow me to notice awkward repeats without having to actively watch for them. Nothing terribly intrusive, mind you, but just a quick flicker of highlight while I type.

When you click on a link in your browser to go to a new web page your browser sends along a Referrer: header, which tells the owner of the site that's been linked to the URL of the site where the link was found. It's a nice little feature that helps website creators know who is linking to them. Referrer headers are easily faked or disabled, but in general most people don't bother, because there's generally no harm in telling a website owner who told you about their site.

My latest project for Onion Networks has just been released: it's a first beta release of SwarmStream Public Edition, a completely free Java protocol handler plug-in that transparently augments any HTTP data transfer with caching, automatic fail-over, automatic resume, and wide-area file transfer acceleration.

SwarmStream Public Edition is a scaled-down version of our commercially-licensable SwarmStream SDK. Both systems are designed to provide networked applications with high levels of reliability and performance by combining commodity servers and cheap bandwidth with intelligent networking software.