They're having some issues with their email -- their email admins are working on it, but there's no estimated time for a fix.
Do you use Webmail (using a browser), or do you use mail through an application?
For several weeks now, I try to send an email from my phone, and it says it can't send, check Outbox. The emails go to the Outbox but will not send. It has always worked before.
It's been a while since we last heard from you, so we will close this thread. If you still have concerns, please start a new thread and include a detailed explanation so we can better assist you.