No confirmation email from AWS SNS in London area

The issue you're experiencing with not receiving a confirmation email from AWS SNS in the eu-west-2 (London) region, while receiving them in other regions, could be due to several factors:

1. Email delivery issues: Sometimes, email delivery can be inconsistent due to various reasons such as network issues, email server problems, or temporary AWS service disruptions in specific regions.

2. Email filters or spam settings: Your email provider or your organization's email system might be treating the confirmation emails from the London region differently. It's worth checking your spam folder and any email filters that might be in place.

3. AWS SNS configuration: There could be a configuration issue specific to the SNS topic in the eu-west-2 region. Ensure that the topic and subscription are set up correctly and that there are no restrictions preventing email confirmations from being sent.

4. Group email addresses: If you're using a group email address, there might be additional settings required. For instance, in Google Workspace, you need to ensure that incoming emails from outside the organization are allowed for the group.

To troubleshoot this issue:

1. Check your spam folder and email filters.
2. Verify the SNS topic and subscription settings in the eu-west-2 region.
3. If using a group email, check the group's email settings to allow external senders.
4. Try subscribing with a different email address to see if the issue persists.
5. Contact AWS support if the problem continues, as there might be a region-specific issue they need to address.

Remember that while AWS tries to deliver confirmation emails promptly, the delivery is on a best-effort basis and not guaranteed. If the issue persists, you may need to investigate further or seek assistance from AWS support.
Sources
SNS topic email subscription - did not receive Subscription Confirmation | AWS re:Post
AWS Simple Email Services - Some users don't receive the email | AWS re:Post
Email notifications to verify subscriptions in AWS Data Exchange - AWS Data Exchange User Guide

I checked steps but still, I didn't get confirmation email. My mail address is compliance@**.com. Maybe your white list emails block comfirmation email.

Kindly refer the knowledge center article for not receiving email notifications from your Amazon Simple Notification Service (Amazon SNS) topic. It have detailed steps on how to troubleshoot this issue.

[+] https://repost.aws/knowledge-center/sns-topic-email-notifications