Forum Discussion
NDR and failed forward
Getting lots of failed e-mail from the no-reply@sharepointonline.com . We have SharePoint Lists that generate notifications when items are changed as part of Employee notifications. Seems to be mos...
BemmelenPatrick This one was rejected to to DMARC failure that may be because DMARC does not traverse on Forwards or Microsoft hasn't set DMARC on sharepointonline.com and the recipient domain MIL is very strict about security.
"Status
Office 365 received the message that you specified, but couldn't deliver it to the recipient (xxxxxxx@mail.mil) due to the following error:
Error: 550 5.7.1 550 #5.7.1 DMARC unauthenticated mail is prohibited
A non-delivery report (NDR) message was sent to no-reply@sharepointonline.com. The NDR might provide more details about why the email message wasn't delivered and how to fix the issue.
Error: 550 5.7.1 550 #5.7.1 DMARC unauthenticated mail is prohibited
A non-delivery report (NDR) message was sent to no-reply@sharepointonline.com. The NDR might provide more details about why the email message wasn't delivered and how to fix the issue.
How to fix it
Ask the sender (no-reply@sharepointonline.com) to follow the instructions in the NDR to fix this issue. The NDR might also include specific information for email admins. If the sender is unable to fix the issue, ask them to forward you the NDR and then follow the guidance for email admins."
This one was rejected by AOL.com (yahoo.com)
Status
Office 365 received the message that you specified, but couldn't deliver it to the recipient (xxxxxx@aol.com) due to the following error:
Error: 554 5.7.9 Message not accepted for policy reasons. See https://help.yahoo.com/kb/postmaster/SLN7253.html
A non-delivery report (NDR) message was sent to no-reply@sharepointonline.com. The NDR might provide more details about why the email message wasn't delivered and how to fix the issue.
Error: 554 5.7.9 Message not accepted for policy reasons. See https://help.yahoo.com/kb/postmaster/SLN7253.html
A non-delivery report (NDR) message was sent to no-reply@sharepointonline.com. The NDR might provide more details about why the email message wasn't delivered and how to fix the issue.
How to fix it
Ask the sender (no-reply@sharepointonline.com) to follow the instructions in the NDR to fix this issue. The NDR might also include specific information for email admins. If the sender is unable to fix the issue, ask them to forward you the NDR and then follow the guidance for email admins.
Although the reference link does not specifically mention DMARC, it does give this explanation, "Your message wasn't delivered because Yahoo was unable to verify that it came from a legitimate email sender.
Your email failed one or more authentication checks that Yahoo uses to verify emails are truly sent from the domains they claim to originate from."
I know there is issues with DMARC and forwards but how is one supposed to tell recipients that the mail is legitimate?
Hello Forest,
The spam protection cannot be turned off because that would mean that a lot of spam would be passed through to the mailboxes.
I'm afraid you will need to either disable the forwards on the mailboxes and tell users to look into their own mailboxes or set up mail flow rules which change the behaviour of the received message.
The spam protection cannot be turned off because that would mean that a lot of spam would be passed through to the mailboxes.
I'm afraid you will need to either disable the forwards on the mailboxes and tell users to look into their own mailboxes or set up mail flow rules which change the behaviour of the received message.