By definition of SPF, SPF only powers IP addresses. For one of our domain names, we have created an SPF record to allow only A and MX IP as the real sender. This domain can be accessed by many other customers. Is hosted in a shared-hosting environment.
In such setup, owners of other domains can easily trick my email on a single host. Is the SPF still working in any way?
(Correct me if I understand that the SPF is wrong)
Yes, they can cheat them, but this is less likely.
If you are worried about your personal mail that you send out of any system or automated mail you make available on the host, then you may want to consider signing a cryptographic They can test the recipient whether they are real or not.
I think that some mail servers automatically apply to sign mails and technically DNS signatures are the situation that my knowledge is odd.
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