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?
Table of ContentsIntroductionVersion HistoryPossible Future
UpdatesDocuments PurposeNAT Operation in ASA 8.3+ SectionsRule Types
Network Object NATTwice NAT / Manual NATRule Types used per SectionNAT
Types used with Twice NAT / Manual NAT and Network Obje...
Table of Contents Introduction:This document describes details on how
NAT-T works. Background: ESP encrypts all critical information,
encapsulating the entire inner TCP/UDP datagram within an ESP header.
ESP is an IP protocol in the same sense that TCP an...