Email sent ? What ?

You changed the status of a ticket and the tool replied "Item updated – email sent".
But what contained that email ? And why did you not receive this email ?

Just go to Menu "Tools" => "Sent emails" to see the content of the email !
You’ll see who was addressee of the email.
If you’re not in the list, just check with you’re admin, it’s a question of email parameters.
But this is another story…

Basically, you should at least see the emails you've sent.
But you can also have visibility on all your project's emails or all the email.
This can be done by the admin, who can parameter email visibility.
Sure he will reserve to himself the last option (see all the emails).

Emailing in Project'Or RIA only uses SMTP email server, by default sendmail on linux/unix.
Exchange is out of scope.