Graymail refers to the type of email that falls somewhere between spam and legitimate messages. It is not quite unwanted junk mail, but it is also not a desired communication. This term is often used to describe promotional or marketing emails that a person may have signed up for, but no longer wishes to receive. Unlike spam, graymail is not malicious or harmful, but it can still clutter up an inbox and be a nuisance. The term ‘graymail’ is derived from the color gray, representing the ambiguous nature of these emails.