After a system crash tonight (Ubuntu), I restarted the laptop and fired up Thunderbird. Now, when I try to send any email, even just a one word test message, I'm suddenly met with this error: "The size of the message you are trying to send exceeds a temporary size limit of the server. The message was not sent; try to reduce the message size or wait some time and try again. The server responded: 4.3.1 Insufficient system resources." I use Thunderbird in conjunction with my company's email server. This message would appear to be coming from our Outlook server, however I get it only when sending a message from Thunderbird. If I use Outlook Web or a VMWare session, I can send mail just fine. Anyone? This is weird.