i have been trying to send emails to a couple of people for the past couple of hours, but when i do i get an error message from [email protected]. an email appears sayin that the email failed to send. This has never happened before, and i have been able to send emails to these people before. i have thought that it could be that the people i am sending emails to have a system error. am i right? or is it possibly something else, like them blocking my email?