Generally defined, email authentication is a multi-method approach to securing email communications.
Email senders create a public record that validates their sending domain is authorized to send email from a particular IP address or mail server. ISPs and corporate email servers use this validation, along with other metrics, to determine if they will deliver a particular message and ultimately to establish the reputation of a sender for allowing future email.
There are currently four different methods or standards that are typically used for email authentication today: Sender Policy Framework (SPF), Sender ID, DomainKeys, and DomainKeys Identified Mail (DKIM). Each standard authenticates using a different methodology. While a sender can authenticate using all of the standards, an ISP may choose to only verify one or more of them.
SocketLabs SMTP relay servers provide the right authentication methods for outgoing email we relay for our customers. We monitor changes in ISP authentication practices and make ongoing adjustments to our protocols so you always have the latest authentication methods at your disposal. All of this expertise is applied in the background so you just send email, and it hits the inbox.
Authentication is only part of the many steps we take to ensure top deliverability for your emails. Contact us today or signup for a SocketLabs On-Demand free account. You’ll be sending authenticated email in minutes!
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