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Aws SES bounce with invalid email address issue

1

We are using SES to send email to notify our customer and to our staff when a ticket or reply to a ticket created. Recently we are getting some complains both from or customers and staff related to not getting email notifications from ticket tool. We check the bounce reports from CloudWatch and it seems that the reasons are same for the bouncing emails. It says that "Amazon SES has suppressed sending to this address because it has a recent history of bouncing as an invalid address" however we know that the email addresses are valid, we checked it with our IT, most of them belongs to our company and valid addresses. Do you have any idea why valid email addresses marked as invalid and suppressed?

3 Answers
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Can you check your account level suppression list? It will tell you why its suppressed (bounce, complaint, etc)

See https://docs.aws.amazon.com/ses/latest/dg/sending-email-suppression-list.html#sending-email-suppression-list-view-entries

From the CLI

aws sesv2 list-suppressed-destinations

You can also view in the SES Console

If an address is on the suppression list for your account, but you know that the address shouldn't be on the list, you can remove it by using DeleteSuppressedDestination operation in the SES API v2.

See https://docs.aws.amazon.com/ses/latest/dg/sending-email-suppression-list.html#sending-email-suppression-list-manual-delete

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answered 21 days ago
  • Hi Matt, Thank you for your reply. We removed the email addresses from account level suppression list several times, but they keep get into list again and again. notification type is bounce and bounce type is permanent. As I said they are valid email addresses. in the report we see that "Amazon SES has suppressed sending to this address because it has a recent history of bouncing as an invalid address". we are quite confused.

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Hi, what is the bounce sub-type you see? https://docs.aws.amazon.com/ses/latest/dg/notification-contents.html

Here are the difference bounce types and bounce sub types with a description of what it means. There are 4 subTypes for 'Permanent' bounce type. Does this leave you a clue on what happened with your email, which was bouncing?

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answered 21 days ago
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This is not due to the account-level suppression list. Rather, this is because of the global-level suppression list. More info on that can be found here: https://docs.aws.amazon.com/ses/latest/dg/sending-email-global-suppression-list.html

Basically what happened is that the first time the email was sent to that email address, it wasn't on an account-level suppression list so SES tried sending it to the recipient MTA. The recipient MTA responded with a hard bounce so SES placed that email address on the global-level suppression list. Email addresses fall off the global suppression list over time (at most, 14 days) and then you'll be able to retry sending to that email address (but only do so if you are 100& confident that a hard bounce will not occur again!). Alternatively, you can contact AWS Support to get that email address removed from the global-level suppression list manually if you do not want to wait 14 days.

answered 2 days ago

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