Part 2's a come'n

I've promised a part 2 to this entry and I will deliver. Granted, nobody has complained about it so far but that is probably because you and them have better things to do with your time. Losers! Just kidding.

In the mean time I've fixed a minor bug in the code. The entry has been updated.

It was a really D'oh! (think Homer Simpson) type of bug. The code (comments) promised to return MX records sorted by preference but in reality it used lexicographical sorting only. So if a domain had two exchangers with preferences of 77 and 100 the 100 would appear before the 77. D'oh!