You are a network administrator for a large company. Several network users have complained that they are receiving odd emails from another user, who claims they have not sent any emails today. Which of the following will most likely stop the issue?
Change the user's account password
Install a more expensive spam filter
Check the networks firewall for unauthorized entries
Changing the account password will most likely solve the issue, but better preventatives should be put in place as soon as possible. Spam filters typically ignore local emails, which is why this is not the correct answer.
Email filtering is the processing of email to organize it according to specified criteria. The term can apply to the intervention of human intelligence, but most often refers to the automatic processing of messages at an SMTP server, possibly applying anti-spam techniques. Filtering can be applied to incoming emails as well as to outgoing ones.
Depending on the calling environment, email filtering software can reject an item at the initial SMTP connection stage or pass it through unchanged for delivery to the user's mailbox. It is also possible to redirect the message for delivery elsewhere, quarantine it for further checking, modify it or 'tag' it in any other way.