Starlink SES Delivery Issue – Emails Not Delivered to stat-mail.com

Based on the information provided, there could be several reasons why emails from Starlink are not being delivered to your domains (stat-mail.com and webmail-navi.com) while emails from other providers are arriving successfully.

Here are some potential causes and troubleshooting steps:

1. Greylisting: Your mail server might be implementing greylisting, which temporarily rejects emails from unknown sending mail servers. This is a common anti-spam measure. Amazon SES would typically retry these messages, and they might be delivered on subsequent attempts. If this is the case, there might be a delay rather than a permanent failure.

2. Spam filtering: Your domains might have specific spam filters that are catching Starlink emails. Check your spam/junk folders and any spam filtering rules you have in place.

3. Sender reputation issues: There might be reputation issues with the specific IP addresses or domains that Starlink is using to send emails through AWS SES.

4. Return-Path and From address mismatch: If Starlink's email configuration has a mismatch between the Return-Path and From address domains, this could cause delivery problems as some email systems may send bounces to the From address instead of the Return-Path.

To resolve this issue:

1. Check your mail server's logs for any rejected messages from Starlink or AWS SES IP addresses.

2. Review any spam filtering rules that might be specifically affecting Starlink emails.

3. If you're using a third-party email service for your domains, contact their support to check if there are any blocks on AWS SES or Starlink-related IPs.

4. Consider temporarily whitelisting Starlink's sending addresses in your email system to test if that resolves the issue.

If you have a paid AWS Support Plan, you could open a technical support case with AWS, providing specific examples of the emails that aren't being delivered, including any message IDs or request IDs if available.
Sources
Amazon SES Delivery problems - Amazon Simple Email Service
Low delivery rate (1.46%) to email list on AWS SES; why only 39 of 2669 emails delivered? | AWS re:Post
SES bounced emails not registering in dashboard, SNS or notifying me | AWS re:Post
Amazon SES Delivery problems - Amazon Simple Email Service
SES not sending mail to a perticular user | AWS re:Post