Our webhosting service -- thinkhost -- has assured me they have identified the 'glitch' that has been affecting our email capabilities. It's something related to SQL on their end, nothing to do with our website or computers. They are working on a repair and should have the situation remedied ASAP. Thank you to those of you who submitted the error messages you received; your cooperation helped tremendously in the troubleshooting process. Let's hope for no more issues!
Thank you for your patience.