When I have asked customer to send an email to my own domain, it passed SPF correctly. Also SPF record of customer's domain is configured correctly.
Does anyone has any idea how to troubleshoot this issue?
Hello, I am sorry, but SPF for both my and remote domain has been created and is working correctly. This does not solves my problem. As mentioned (and as you can see), Exchange tries to resolve customer's end user IP (which is local intranet adress) to verify
it with SPF record of customer's domain. Instead of it it should try to resolve used mailserver IP to verify it with SPF record of customer's domain. Am I right?
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