Some of us get a lot of spam and unwanted email. Therefore, the UiO set up strong spam filtering centrally. You can make also set your own spam filtering settings.
A signature is a predefined text that is automatically added to the bottom of the e-mails you send. It should be short - preferably no longer than four lines, and typically includes contact information.
Here you can read about how to set up the webmail service to automatically filter and sort your messages.