Emails could not be delivered as Amazon IP is under block list

Question

Hi there,

Unfortunately I received email notifications that my newsletters could not be sent due to the error below:-

An error occurred while trying to deliver the mail to the following recipients:
Reporting-MTA: dns; b232-11.smtp-out.ap-southeast-2.amazonses.com

Action: failed
Final-Recipient: rfc822; 
Diagnostic-Code: smtp; 550 5.7.1 Unfortunately, messages from [69.169.232.11] weren't sent. Please contact your Internet service provider since part of their network is on our block list (S3150). You can also refer your provider to http://mail.live.com/mail/troubleshooting.aspx#errors . [HE1EUR04FT027.eop-eur04.prod.protection.outlook.com ]
Status: 5.7.1

It looks like the IP address listed (69.169.232.11) above belongs to Amazon.

Is there anything you can do on your end to fix this issue?

Thank you kindly.

Answer

Hi there,

Thanks for your reply. I've looked at the KB article and I don't think it applies to me. 
It seems like only emails sent to "hotmail.com" or "outlook.com" are undelivered. There doesn't seem to be an issue sending to other domains.

Answer

Please check this troubleshooting guide from AWS Premium Support to see if any of the conditions apply to you - https://aws.amazon.com/premiumsupport/knowledge-center/ses-resolve-emails-not-delivered/

Emails could not be delivered as Amazon IP is under block list

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