Re: Problems with mail system? [Fwd: Returned mail: User unknown]
On Sep 07, Jason Gunthorpe <email@example.com> wrote:
>This is just your standard lack of reverse DNS.. Part of the anti-spam
>bit. The sender needs to get working reverse DNS I suppose..
Looks like a stupid check, to me.
Some very big ISP here have mailservers with no reverse mapping...
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