I was hired by an engineering firm to fix and update their website and I'm having trouble getting Sendmail to work correctly again. They have a form on their site that stopped working in the middle of December at approximately the same time they installed Barracuda. When I run a test script to attempt to send mail, it doesn't throw an error, but it does get stuck in the mail queue. If you're a Sendmail guru and you think you can fix this problem, please reply and let me know what you need in terms of error logs or additional information. I can't give you access to their system, but I have SSH access and admin level access so I can get you any info that you should need to troubleshoot and hopefully fix the problem.