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Re:Please do not put IP addresses into DNS MX records by MayeulC on Monday February 22, 2021 @03:04PM (#26229811)
It might not be legal, but works quite well for me.

Having a dynamic IPv4 address with multiple domains on it, updating every record would take more time.

Admittedly, I could also have a copy of the IP per domain, but the CNAME was easier to setup.

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