It occurs when a recipient of a message complains about or reports a message as abuse. The most frequent mechanism for this is by clicking on the Spam button in a Web interface or MUA (mail user agent). However, it can also involve opening a ticket with a Mailbox Provider’s support or abuse desk or sending an email complaint to the Mailbox Provider’s support or abuse desk or to the sender of the message. It could also include making a phone call to the Mailbox Provider’s support or abuse desk or to the sender of the message for the purpose of complaining about being sent the message.

It occurs when a recipient of a message complains about or reports a message as abuse. The most frequent mechanism for this is by clicking on the Spam button in a Web interface or MUA (mail user agent). However, it can also involve opening a ticket with a Mailbox Provider’s support or abuse desk or sending an email complaint to the Mailbox Provider’s support or abuse desk or to the sender of the message. It could also include making a phone call to the Mailbox Provider’s support or abuse desk or to the sender of the message for the purpose of complaining about being sent the message.