I ended up deleting my account and registering it again, and it worked, but this is a workaround.

As pointed out by other people, the native Mail app is buggy, so I started evaluating Touchdown.

Native Exchange Email app does not synchronize folders properly
What are the best tips for saving money as a university student?

I will be attending university this coming semester and am planning on maintaining a sustainable financial situation right now, but would like any good tips or suggestions to saving money as a student.
