Domain Authentication

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Domain authentication verifies an email from the point of its origin by validating the sender. Internet service providers (ISPs) use DKIM and SPF authentication to scan incoming emails for Spam and spoofed addresses. Think of it as a digital signature that protects your identity and reputation. Authenticating your domain ensures a smooth transfer of your email to the recipients inbox and avoiding spam filters. It's one of the most important steps you can take to improve your deliverability.

Emails that fail authentication are most likely to end up in the Spam folder or the junk folder. To ensure your emails and campaigns are delivered straight to the recipient inbox and to make them look more professional, you can opt for the following domain authentication methods.

Domain authentication methods:

SPF: This method allows you to specify the mail servers (IP addresses) which can send emails on your behalf. This can be done by publishing the TXT record in your domain's DNS settings.

DKIM: This is a more advanced method used widely by Email Service Providers (ESPs). It allows the senders to authenticate their campaigns by including a digital signature in the email header. This can be done by publishing the TXT record in your domain's DNS settings.

Why authentication matters?

When emails were initially designed, sender details were easy to forge or spoof. Spammers and phishers take advantage of this by posing as banks, energy companies, etc. to steal money and/or spread virus.

Email Services Providers like Gmail, Yahoo, Outlook and others, use email/domain authentication to help confirm if an email is a Spam or something fishy, and requires blocking to protect their users. Any unauthenticated email runs a risk of ending up the Spam or Junk folder, no matter how legitimate it looks.

Also, it helps to know that your domain or IP is not a part of any blacklist database. You can check your blocklist status with our free tool here.

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