A large part of email deliverability comes down to taking every step possible to avoid being perceived as a spammer in the eyes of spam filters and your recipients.
One of the most definitive ways in which you can affect this is by authenticating your emails. Authentication allows ISPs to acknowledge the legitimacy of your email sends.
So what is email authentication?
Authentication is a way to prove an email is not forged.
Authentication technology gives the recipient mail servers a record of identification to check, to ensure the sender is legitimate. Emails that fail to pass authentication checks may be blocked or put through additional filters, potentially preventing them from reaching the inbox.
Email services like AOL, Gmail or Yahoo (as well as corporate email servers) use one or more of these authentication methods to verify sender identity:
DKIM (Domain Keys Identified Mail)
SPF (Sender Policy Framework)
Why is Authentication Important?
Many email providers use authentication, among other things, to track sender reputation. Without it, the chances of...