![]() ![]() This solution is available through Microsoft or through a third-party provider. The information and the solution in this document represent the current view of Microsoft Corporation about these problems as of the date of publication. Microsoft makes no warranty, implied or otherwise, about the performance or reliability of these products. The third-party products that this article discusses are manufactured by companies that are independent of Microsoft. To resolve this issue, all devices that are running iOS or watchOS must be updated to the latest version of the software. Download watchOS 3.0 -3.2.3 Information.For more information, see the following Apple Knowledge Base articles: This issue is addressed in the latest Apple iOS (10.3.3) and Apple watchOS (3.2.3) updates. ![]() This issue occurs if the Exchange ActiveSync client for the attendee sends a SmartForward command for this meeting. Notice the DMARC result here, it’s “ dmarc=success(p=NONE) om= ” so if CompanyA publish reject DMARC policy, then if compan圜 enforce DMARC rule, the meeting invite will never get to Compan圜.Meeting attendees receive a forwarded meeting invitation from another attendee for an existing meeting. Received-SPF: pass (domain of designates 88.31.233.132 as permitted sender)Īuthentication-Results: 1. ĭmarc=success(p=NONE) om= MIME Part = 1Ĭontent-type: text/plain charset=US-ASCII If you can see in the DMARC forensic report, there is sender header which is CompanyB, but the from is indeed CompanyA. The same happens to DKIM allignment, thus failed DMARC. The root issue is that when you forward the invite, it keeps the “From” Header (CompanyA), while the “MFrom” header will be changed to CompanyB, though it passes the SPF, however fails on SPF allignment. Please contact the administrator of <<< 550-5.7.26 domain if this was a legitimate mail. <<< 550-5.7.26 Unauthenticated email from is not accepted due to <<< 550-5.7.26 domain's DMARC policy. Transcript of session follows - … while talking to gmail-smtp-in.l. The following addresses had permanent fatal errors - 550-5.7.26 Unauthenticated email from is not accepted due to) Then on the mail gateway in Company C, if enforcing DMARC ( SPF/DKIM) then the email is never reached, you (CompanyB) will receive the following error return message like below (gmail is compan圜 in example): The original message was received at Thu, 14:41:03 -0400 from ![]() Usually when you receive a meeting invite from CompanyA ( ), if you (CompanyB) want to forward the invite to Compan圜 ( for example, your personal email account in gmail or yahoo). Meeting invite forwarding is one of the manual forwarding that will fail DMARC. ![]()
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