Apps similar to Relaymetry include MxToolBox, which has a free version. Other options are EasyDMARC and mail tester. In total there are three Email Marketing Services like Relaymetry for the web.
All of your MX record, DNS, blacklist and SMTP diagnostics in one integrated tool. Input a domain name or IP Address or Host Name. Links in the results will guide you to other relevant tools and information.
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EasyDMARC’s data-driven SaaS-based platform empowers organizations to implement and monitor DMARC, DKIM, SPF, and BIMI. These crucial and globally adopted email security standards, both old and new, protect the employees, partners, and customers by eliminating email fraud...
mail-tester.com is a free online service that allows you to test your emails for Spam, Malformed Content and Mail Server Configuration problems.
