Emails and txts are not necessarily instantaneous. Occasionally I have experienced delays of a couple of hours or more.
a) if the important email is being rejected, ask the sender the reason why.
b) have the sender send to a different address (not hotmail)
c) in case there are Hotmail problems, you might use a differnet email provider for contacting the sender.
Please advise back on progress.
As a matter of interest, where are you located? I am in Hammersmith, West London.
Good Luck - Keep us posted.