I've already sent an email to support but I'm reposting here as I'm slightly concerned about time (90 mins till the end of the working day here in the UK).
I sent an email this afternoon (an hour ago) - nobody from Hotmail has received it yet. Are you currently experiencing delays?
We have approximately 1000 Hotmail users on our list - quite a big amount. Would ideally like to get these out in the next hour before everyone leaves work.
From reports that we've seen elsewhere it looks like it's a problem on Hotmail's end. They're having some issues on their servers and it's causing delays, bounces, etc. Unfortunately, that's outside of our control.
A quick search on Twitter does in fact reveal that Hotmail does seem to be suffering delays today.
Thanks for the quick response.