Email Security GURU – Part 4 – DMARC

DMARC (Domain-based Message Authentication, Reporting and Conformance) is the wrap around for SPF and DKIM that helps receiving email servers decide how to align incoming email with SPF & DKIM and provides a mechanism for reporting back to the domain owner. DMARC...

Email Security GURU – Part 3 – DKIM

DKIM (DomainKeys Identified Mail) is an email authentication (or signing) method designed to detect spoofing (forged sender addresses in email). Essentially, each outgoing email is signed with a private key, which the receiving server then checks against a public key...

Email Security GURU – Part 2 – SPF

Lets get to it. SPF or Sender Policy Framework is an inbound check on your outbound email. Essentially its a list email hosts (servers) that you allow to send email for your domain. It is a TXT (text) record attached to your Domain DNS Zone which has to follow strict...

Email Security GURU – Part 1 – MX Servers

Lets first discuss what MX Servers mean. If you know DNS, then you know MX (Mail eXchanger) is the DNS record which lists the email server responsible for accepting inbound email for a domain. This can be anything so long as it accepts inbound from the internet on any...