Understanding Spam Filters and Anti-Spam Tactics
When a spammer masquerades as you, delivery failure messages — and spam — called backscatter can show up in your inbox.
DomainKeys Identified Mail (DKIM)
DomainKeys Identified Mail (DKIM) lets senders claim messages as theirs in a verifiable manner (to help ward off phishing scams or make it past spam filters, for example).
Vouch By Reference (VBR)
Vouch By Reference (VBR) allows email senders to list third parties that, they believe, will vouch for them to avoid costly spam filtering.
What Does Spam Filter Accuracy of 98 Percent Mean?
Find out why your inbox is littered with spam even when your spam filter is highly accurate.