i too have had the same problem for several days, and stymied as to how to fix the problem. the 'send' icon does not seem to work when i try to report the issue to 'support'. i'd appreciate any further suggestions as well for assistance.
Unable to read sent messages

Which browsers are you using? I've just tried it on mine using Win 7 with the latest Firefox (cache cleared) and its working for me.
So I can try to see what you're seeing, if you can let me know browser/version / operating system, I can try this end to replicate. If I can, then I can get it fixed hopefully
For the last few days, I have been unable to read my sent messages. I can see the list, but when I click on a message (again, those that I have sent), I get a server error message. Probably not many people read the messages that they have sent, but I do... so if this problem has not been reported yet, then consider it done!