Your lucky they accepted an email
version of your "blue card" Rabbi. Friends of ours were kept in port for over a week last year while an original letter was priority posted. The earlier email
version was not accepted.
The required amount is 500,000 Euro (at least it was last year) and it must be in original form and in Greek.
I just got mine from Pantaenius today. its an email bit ill be sure to print it out on some nice blue paper before I go. Its for 10M USD this year.