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Re:Ask HN: Is it possible to run your own mail server for pe... by joosters on Saturday August 13, 2016 @06:57PM (#12283485)
Thank you for mentioning https://www.mail-tester.com/ - I wish I knew this site existed back when I was setting up my mail server. I struggled setting up SPF and DKIM, having a site that validates your config is very helpful.

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