ubuntu - Unable to have a system-wide email

My uni has a setting which puts my email address to all programs which I use. I would like to have a similar setting for me.

For instance, I cannot remember how to set up an email address to mutt. I would like to have a system-wide setting which gives my email address for mutt.

How can you set up a system-wide email address in Ubuntu?

Answer

Do you perhaps mean your user account email, so that applications automatically pick up your user's email address by default?

If so, check System -> Preferences -> About Me, and set your default user email address in there.