Can log in via webmail, and log in thru Thunderbird. Receiving incoming mail fine. Sent an outgoing email with pics an hour ago. Tried to send another a few minutes later, and whether it's a plain email or one with pics, it says it can't go thru at this time. "The server responded: 5.4.0 A temporary problem was encountered while processing this message. Please check the message and try again later."
Are you still having this problem? Can you try using a web browser and see if that works?
Other people asked questions on similar topics, check out the answers they received:
Other people asked questions on various topics, and are still waiting for answer. Would be great if you can take a sec and answer them