Sorry, your domain keeps rejecting my email. 1 of 3 possible problems based on the error message I receive. Either your system thinks I am spam since i am coming from USA Yahoo and you are not in the US, or the file size is too large because of all the attachments exceeds your allowed incoming email limit (could be timing out), or your system does not allow PDFs because they are known to carry malicious executable code. Just a guess, but I keep getting rejection notices.