The Cheap Way to Keep Spoofed Email Out of Your Inbox
Email spoofing is on the rise. Country IP Blocks estimates that spoofing may account for more than 80% of all spam and malicious email traffic. Email spoofing is defined as the forgery of an email header so that the message has the appearance of originating from a source other than the actual source.
While any spoofed email is a problem, the problem becomes magnified when the spoofed email appears to come from an expected source. For example, company EXAMPLE has 100 employees and each employee has an EXAMPLE email account. If the company is using a program like SpamAssassin or other similar anti-spam software, they probably use a blacklist and whitelist to aid the spam filters. Company EXAMPLE may use a wildcard to blacklist *@EXAMPLE.com and then whitelist their legitimate email accounts, such as john_doe@EXAMPLE.com. The spam filters will give special consideration to email accounts appearing on the whitelist. Here is where a major problem may begin. Read more…
