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How Do I Know What Blacklists My Email Server Is Listed On?
I cannot send out Email to your server. I get a message "553 Relay Denied" but was once able to send out Email to you. How do I know what blacklists my Email server is listed on?
Point your web browser to: http://www.openrbl.org/. This web site tests 30+ blacklists to determine if your IP address is blacklisted. When testing please use your Email server IP address, which may or may not be the same as the IP address of your website.