EC2 is funny about sending email. Plenty on the web about that. If you just want to set it up for your own emails (e.g. maybe a monitoring script or something) you could consider using GMail. See this reference for full details.
errors and problems
This is caused by a missing module in Apache: the mbstring module There are other similar errors mentioned on the forums, but ‘parsererror’ in particular is caused by the missing module above You need to run EasyUpdate in WHM and add mbstring in the Extended Options step See here for more.
Check your admin rights haven’t vanished (For Windows, try creating a directory in Program Files)