I'm getting an " unrouteable mail domain " message when I send email. What's wrong? Print

This error most often indicates that you have reached our limit for sending mail for the given hour. Mails are limited to 1500 per hour per user.

This limit is in place to curb any spam attacks that might take place on our servers. We don't have this limit in place to inconvenience you, but rather to protect us all from the very pervasive problem of spam.