Now users on Gmail can divide themselves from unsolicited and unwanted marketing emails with ease.

When users mark certain emails as "Spam," a window will appear asking if they would like to unsubscribe from all future instances of messages from the sender:

"We'll send a request to the sender that your email address be removed from the list," reads a message in Gmail's help pages (via Lifehacker).

Not all messages marked as spam will be outfitted with an unsubscribe options. Users are also cautioned that unsubscribes may take several days.

Five-year-old Gmail is now the third most-used web mail provider, serving 146 million users, behind Hotmail (343 million users) and Yahoo Mail (285 million).

By 2014, users are expected to get over 9000 email marketing messages a year, or 25 messages per person per day — double the amount they currently receive on average.

Perhaps in response to this deluge, last year a Q Interactvive found that users' perceptions of has evolved to from "unsolicited commercial email" to any email that is unwanted.