Careless Reading
Some people don't read their emails carefully. They might delete them and then believe they never received them.
Solution:
Firewalls, Spam Checkers, And Other Defences
Firewalls and spam checkers may be set up so rigorously that they reject legitimate emails. They may object if emails are sent in batches, or from an outside source, but with an inside return address (e.g. your project administrator).
Solution:
Phone
Toll free 1 866-659-2926
International +1 289-255-1223
Email
[email protected]
Monday to Friday, except holidays
9:00 am - 5:00 pm ET
1400 - 2200 GMT/UTC