AWS SES server on spamcop list

When you use Amazon SES, by default your emails are sent from IP addresses that are shared with other SES users. Sometimes the IPs are listed in DNSBL due to other users. There are measures in place to minimize this, and measures you can take as listed in Documentation: DNS Blackhole List (DNSBL) FAQs for information.

If you need complete control over your sender reputation, consider Dedicated IP addresses