We have collected information about Delivery Was Refused 5 2 1 Public Folder for you. Follow the links to find out details on Delivery Was Refused 5 2 1 Public Folder.
https://docs.microsoft.com/en-us/exchange/mail-flow-best-practices/non-delivery-reports-in-exchange-online/fix-error-code-550-5-7-1-in-exchange-online
Remote Server returned '<xxxxxxxx> #5.7.1 smtp;550 5.7.1 RESOLVER.RST.AuthRequired; authentication required [Stage: CreateMessage]' To configure the public folder to accept messages from external senders, follow these steps: Open the Exchange admin center (EAC). For more information, see Exchange admin center in Exchange Online.
https://community.spiceworks.com/topic/151527-sporadic-5-2-1-ndr-bounced-by-mail-enabled-public-folder
Aug 15, 2011 · Public Folder Name on 8/12/2011 8:46 AM The message reached the recipient's e-mail system, but delivery was refused. Attempt to resend the message. If it still fails, contact your system administrator. <host.domain.com #5.2.1>
https://www.experts-exchange.com/questions/24643376/Exchange-2007-Public-Folder-delivery-refused.html
Find answers to Exchange 2007 Public Folder delivery refused from the expert community at Experts Exchange
https://docs.microsoft.com/en-us/office365/troubleshoot/antispam/relay-access-denied-ndr
Case 2: The EOP inbound connector has not been created, or it is either set up incorrectly or disabled. Resolution. To resolve this issue, use one of the following methods, as appropriate for your situation. Case 1. Make sure that the delivery address is set up correctly for the on-premises Send connector.
https://www.experts-exchange.com/questions/23428720/The-message-reached-the-recipient's-e-mail-system-but-delivery-was-refused-Attempt-to-resend-the-message-If-it-still-fails-contact-your-system-administrator-Backendserver-domain-net-5-2-1.html
May 23, 2008 · The message reached the recipient's e-mail system, but delivery was refused. Attempt to resend the message. If it still fails, contact your system administrator. <Backendserver.domain.net #5.2.1> I replaced the recipient names and server name for security reasons.
http://ben.goodacre.name/tech/Bounce_5.2.1_when_emailing_a_public_folder_(Exchange)
When emailing a mail-enabled public folder on Exchange the email can bounce and a NDR (Non Delivery Report) is issued with the following text: The message reached the recipient's e-mail system, but delivery was refused. Attempt to resend the message. If it still fails, contact your system administrator. <exchangeserver.domain #5.2.1> Cause
https://social.technet.microsoft.com/Forums/en-US/f4b8e2e9-13c3-46fe-ae9f-8d68412d744c/ndr-521-when-emailing-a-public-folder-after-migrating-to-exchange-2010
May 10, 2011 · NDR 5.2.1 when emailing a Public Folder after migrating to Exchange 2010. Previous Versions of Exchange > Exchange Server 2010. ... but delivery was refused. Attempt to resend the message. If it still fails, contact your system administrator. <emailserver.net #5.2.0 smtp;554 5.2.0 STOREDRV.Deliver.Exception:AccessDeniedException ...
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