How to avoid an authentication warning on emails sent on SES with a verified email address?

Question

Using my marketing solution, built on AWS SES, my customers can send emails. One customer has verified his email address to send emails. He cannot verify a domain (creating DNS entries is too complicated for him).

When he sends emails to recipients, Gmail shows the email with an authentication warning:
"The sender hasn't authenticated this message, so Mail can't verify that it actually came from them. Avoid clicking links, downloading attachments or replying with personal information."

Indeed, I can see the email is sent from the client's verified address **via amazonses.com**. The email is sent by **eu-west-3.amazonses.com** and signed by **amazonses.com**.

How can I avoid this warning from appearing on my clients emails?

Max Clements · Answer

You can read more about e-mail authentication here: https://docs.aws.amazon.com/ses/latest/dg/email-authentication-methods.html

But in short, if you cannot create a DNS record in your sender domain, you will not be able to authenticate the e-mail effectively.

How to avoid an authentication warning on emails sent on SES with a verified email address?

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