The meta information prepended to email messages to provide content information and log the message’s path from sender to recipient. Headers are added by the sender's email client, and by each mail relay that passes the message toward its destination. Normally, the node that retrieves the message doesn't add any further headers. Typical email headers include: To, From, Subject, Date, User-Agent, and Received.
© 2017 Sophos Limited. All rights reserved.