You have spent more time telling us about the invalid email address than it would if you picked up the phone and called them :-)
So it is can't be an issue about time/money. There will always be some invalid contact info anyway. It's the percentage of it you want to reduce I guess.

Badguys Killer wrote:

     It's not a matter of laziness or not, but a matter of time and
money.  I mean, should I use my own time and my company's money to fix
something not belonging to me/us?  Of course, I won't argue that
someone might say YES, and this is very generous.  But discarding
generosity from someone full of resource (time, money), I doubt this
YES means a majority.  I'm quite certain that common sense would make
most of us say NO.


2009/4/24 Jørgen Hovland <jorgen@hovland.cx>:

May I suggest,

If the contact method doesn't work, use another.  Also please tell the LIR
about the invalid contact information when you reach them. If you are too
lazy to use another contact method, the incident is obviously of no
importance.
If none of the contact methods listed for the LIR work, tell the RIR about
it and they will hopefully update the contactinfo (or you can perhaps also
ask for proper contact info on this list).
Contactinfo for the RIR is listed on their website.