We have published SPF, DKIM and DMARC and now we start getting DMARC Reports. What is strange is that there are few messages that are send with email Ironport hostname? We have some situations when we return mail reject custome message but that message is sent as MAILER-DEAMON@domain.com not as ironport.hostname.local. How can we find what message is send with ironport hostname because if we search in message tracking “sender contains ironport.hostname – nothing is found”.
<record> <row> <source_ip>XXX.XXX.XXX.XXX</source_ip> [this is legit IP adress of MTA] <count>3</count> <policy_evaluated> <disposition>none</disposition> <dkim>fail</dkim> <spf>fail</spf> </policy_evaluated> </row> <identifiers> <header_from>domain.com</header_from> </identifiers> <auth_results> <spf> <domain>ironport.hostname.local</domain> <result>neutral</result> </spf> </auth_results> </record>
Beside that do you have some experience with DMARC and when some other companies have some auto forwarder rule - then forwarder does not rewrite sender and then you get DMARC fail results?
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