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Grow | Understanding and Resolving 5.7.26 Email Errors
Grow | Understanding and Resolving 5.7.26 Email Errors

Seeing an email error listed in the conversations tab after sending an email?

Updated over a week ago

Understanding and Resolving 5.7.26 Email Errors

If you're encountering an error message in your Grow account while sending emails, especially if you'r sending to iCloud or Yahoo, this guide will help you understand and resolve the issue. We've made it simple, so even if you're not a tech expert, you can follow these steps easily.

Problem: The error message you're seeing is: "5.7.26 Unauthenticated email from is not accepted due to domain's 5.7.26 DMARC policy." This message is telling you that there's an issue with the email you're sending.

Cause of the Error

Mailgun, the email service used by Grow, is rejecting emails from Yahoo or iCloud because they don't match the email setup in your Grow account. For example, if your Grow account email is set as "," but you're sending emails from "," that's what's causing the problem.


To fix this issue, follow these simple steps:

Use the Correct "From" Address:

  • Always make sure the "From" address when sending emails matches your Grow account email, which should be {{}}. In this case, it should be ""

Preventing Email Errors in the Future

By following these steps, you'll ensure that your emails are sent without any issues, and they'll be recognized as legitimate by Mailgun and the recipient's email service.


We hope this guide has helped you understand and resolve the 5.7.26 email error in your Grow account. Remember to always use the correct "From" address, and in case of any doubts, contact Yahoo or iCloud support to verify your emails. If you have any further questions or encounter any other issues, please don't hesitate to reach out to our support team for assistance.

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