Thank you for recommending our Server Monitoring. This tool is great for monitoring your server for up/down activity or if you server has been Blacklisted we wi

Thank you for recommending our Server Monitoring. This tool is great for monitoring your server for up/down activity or if you server has been Blacklisted we will alert you. Our site has several other tools on it that you may find helpful including SMTP diagnostics to confirm your PTR and rDNS records and and MX Lookup tool as well. Thanks again, @MxToolBox