Well hope this helps- I know with my ISP they have for thier email some spam filters... also along the lines of hotmail...Some will filter out for examp
TEST MESSAGE (subject line)
the all caps used for some filters.
YOU are #1 and and Tops in the Field!!!!!!
The use of the punctuation.(!!!!!)
(LOL) or Blank Subject lines.
They filter those out for the use of ( ( ) ) and the blankness.
Also sometimes mail for example depending on the server can take up to 24 hours to be posted- because of updates and network traffic.
So it is possible the mail you are not getting could fall into those categories.
Also if your email has a bulk mail folder sometimes the limits on that do not allow for incomming traffic.