I’ve been libelled in an e-mail. Is there any action I can take about this?
Yes, in theory, as long as the e-mail was circulated to other people. If you alone read the e-mail you don’t have a case. If you’re seeking damages, or compensation, be warned that libel actions can be expensive and public funding isn’t available. Unless you have substantial means with which to fund the case (and your accuser has the means to pay you compensation) you should forget it. If the e-mail was circulated in your workplace you should make a complaint to your employer, who has a duty to protect you from harassment and also to immediately delete the message if it was posted on the in-house computer system.