I want to record the address for the best archives of lists like perl5-porters and modules, I think. I'm always forgetting it.
The xray I associated with xray vision, so I thought it's a jokey site, but it appears it's the site of the xray astronomy division of one of the German Max Planck institutes. Academic German URLs don't appear to have a ac. or edu. subdomain.
The mp of mpe and mpg is Max Planck. I can only remember the e and the g by the fact e comes before g.
I guess I have to thank German taxpayers for supporting the archiving of perl mailing list messages, something which has only an indirect link with xray astronomy.