According to the link AWS SES doesn't have IPv6 support.
That page Dmytro linked has a table "Services that support IPv6" which includes only services that have some form of IPv6 support, so because SES isn't listed at all it means it has no IPv6 support. As I commented before though, the scope of "no IPv6 support" is a bit ambiguous to me as to whether that's referring only to the service API or provisioned resources like smtp endpoints as well. So I checked at https://docs.aws.amazon.com/general/latest/gr/ses.html where SMTP endpoint domain names are listed, and tried "nslookup" on the us-east-1 ones - email-smtp.us-east-1.amazonaws.com and email-smtp-fips.us-east-1.amazonaws.com. These both returned only IPv4 addresses so I'm convinced that the SMTP endpoints don't support IPv6.
A possible solution would be to use NAT Gateway or NAT Instance on public network https://docs.aws.amazon.com/vpc/latest/userguide/vpc-nat-gateway.html https://docs.aws.amazon.com/vpc/latest/userguide/VPC_NAT_Instance.html (cheaper, tested)
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