I have used mailgun service in the past using Sender as:
Excited User [email protected]
But since last few days getting this error:
<code>5.7.26 Unauthenticated email from example.com is not accepted due to 5.7.26 domain's DMARC policy. Please contact the administrator of 5.7.26 example.com domain if this was a legitimate mail. To learn about the 5.7.26 DMARC initiative, go to 5.7.26 https://support.google.com/mail/?p=DmarcRejection d75a77b69052e-4536a08f3b6si39671191cf.471 - gsmtp
</code>
<code>5.7.26 Unauthenticated email from example.com is not accepted due to 5.7.26 domain's DMARC policy. Please contact the administrator of 5.7.26 example.com domain if this was a legitimate mail. To learn about the 5.7.26 DMARC initiative, go to 5.7.26 https://support.google.com/mail/?p=DmarcRejection d75a77b69052e-4536a08f3b6si39671191cf.471 - gsmtp
</code>
5.7.26 Unauthenticated email from example.com is not accepted due to 5.7.26 domain's DMARC policy. Please contact the administrator of 5.7.26 example.com domain if this was a legitimate mail. To learn about the 5.7.26 DMARC initiative, go to 5.7.26 https://support.google.com/mail/?p=DmarcRejection d75a77b69052e-4536a08f3b6si39671191cf.471 - gsmtp
Is there any other domain that can be used under free plan?
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