Try these fixes: Make sure the recipient address is valid. Reduce the number of recipients in the message. If you received this error when sending a message using ...
A few days ago email sent with outlook.com to one specific user gets bounced back with a mail delivery failure message. It happens with my windows phone 8, ...
The message property only preserves the legacyExchangeDN attribute when Outlook delivers the message, and therefore the lookup could fail.
Thank you for posting your query on Microsoft Community. To assist you further with the issue could you please confirm a couple of things: How do you access ...
Fix email delivery issues for error code 550 5.1.1 through 5.1.20 in Exchange Online
All new emails I try to send from Outlook.com, and all I try to reply to are being returned to me with a Delivery Failure message. This is a relatively new problem.
Admins can learn how to fix email delivery issues in Exchange Online
My outlook account now won't send any emails - I get delivery failures when trying to send anything to anybody. This is happening on all the ways I access the ...
Learn how to fix email issues for error code 5.7.1 (and also 5.7.0 to
Hi, I've received two emails today, apparently from Outlook, with the subject " Delivery failure: Some messages were not sent". The senders ...