At the time this page was written, the computers in Thompson 191 all had the latest version of the submitter extension, and the firewall settings have been adjusted such that electronic submission is possible. In other words, submission works from the lab in Th191. This is not true of the other labs on campus. The firewall settings for the rest of the campus will not allow BlueJ to send the outgoing E-mail message. You can either submit from Th191, or from your personal machines (assuming you don't have firewall software on your computer that prohibits BlueJ from sending E-mail).
C: drive instead of H: or Z:.
C:\BlueJ\lib\extensions. (On a mac, control-click the BlueJ application itself and view the package contents. The new submitter goes in Contents/Resources/Java/extensions.) Do not just re-install BlueJ — version 2.2.0 is still bundled with the old version of the submitter. If in doubt about which version of the submitter you're using, go to the "Help" menu and select "Installed Extensions". Click on the balloon containing a question mark. The submitter version should be "12 Sep 2007" or later.
IOException while sending messageThis almost certainly means that you're using the old version of the submitter extension. Re-read the section on updating the submitter above if you're using your own machine. If you're in Th191, re-read the tip on running the correct version of BlueJ.
SMTP Host not set in PreferencesYou haven't set the preferences properly. Re-read the section above on setting preferences.
Email address not set in PreferencesYou haven't set the preferences properly. Re-read the section above on setting preferences.
Could not connect to SMTP host: smtp.ups.edu, port: 25Either you're not connected to the network or, more likely, the computer you're using is running firewall software that's preventing BlueJ from sending E-mail. If this is your own machine, disable your firewall software while you submit, or look for settings that will allow outgoing E-mails to be sent. (The specifics of this depend upon the firewall software running on your computer, and are beyond the scope of this help page.) This message will also appear if you're trying to submit from off campus and are not using the VPN. You can learn more about the VPN and download the software here.
bluej-debuglog file. If you send me this file, I'll have a much better chance of being able to help. BlueJ will tell you where this file is being stored if you select "About" from the "Help" menu. On a PC running windows it's probably in C:\Documents and Settings\User\bluej. On a mac it's in Library/Preferences/org.bluej.