Email headers contain critical information about the email, and RFC 5322 provides strict guidelines on how these headers should be formatted. For example:
- The From field must contain the email address of the sender. - The To field must contain the email addresses of the recipients. - The Subject field should accurately reflect the content of the email. - The Date field must indicate when the email was sent.
Properly formatted headers ensure that the email is processed correctly by email servers and is less likely to be flagged as spam.