As someone who reads through hundreds of support cases each month, nothing pains me more than seeing customers struggling with seemingly complex issues, only to discover that the root cause is quite simple. Never is this truer than it is with DNS. Some of the most complicated security and lost mail issues boil down to a few simple records. In fact, we get well over a thousand tickets per month that could be easily avoided by addressing DNS issues. This blog post could save you time, frustration, even money! Please note that I’m focusing on Office 365 email DNS records here, especially those involved in routing & security decisions – but this advice may be applicable more broadly.
> server 18.104.22.168
Default Server: b.resolvers.Level3.net
> set q=mx
contoso.com MX preference = 10, mail exchanger = mail.global.frontbridge.com
> set q=txt
contoso.com text =
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