Delivery is delayed to these recipients or groups
After sending an email (with Outlook, but the same can happen using OWA or any email client connected to Exchange), the following message is generated by Exchange:
Delivery is delayed to these recipients or groups:
Subject: Original message subject
This message hasn't been delivered yet. Delivery will continue to be attempted.
The server will keep trying to deliver this message for the next 1 days, 19 hours and 53 minutes. You'll be notified if the message can't be delivered by that time.
where "their@email-address" is the email address of the intended recipient, "Original message subject" is the subject of that sent message. The time will be different.
This is an information message telling you that Exchange could not deliver the message but that it will try again.
Only the Exchange administrator can investigate the cause of this message. If you are a user then forward the message to your Exchange administrator and ask him/her to investigate.
- Do nothing.
The message says that Exchange will try again to deliver the message. Email servers do go down and mostly they come back up again.
That said, Exchange only generates this message after it has been trying to deliver the message for a day, so it may be wise to investigate.
- Use the Queue Viewer to see why the email has not yet been
- Start up Exchange Management Console
- Open the Toolbox
- Open "Message Tracking"
- Find the message in the list.
- Open its properties and look at the "last error". This will tell you the reason why the email has not yet been delivered.
Unfortunately when you open "Message Tracking" you may see the following error:
Cannot process argument transformation on parameter 'BookmarkObject'. Cannot convert the "Microsoft.Exchange.Data.QueueViewer.PropertyBagBasedMessageInfo" value of type "Deserialized.Microsoft.Exchange.Data.QueueViewer.PropertyBasedMessageInfo" to type "Micrsoft.Exchange.Data.QueueViewer.ExtensibleMessageInfo".
If you get this error then you will need to use the Exchange Management Shell approach below. Microsoft are aware of the error but appear to have no interest in fixing it (for Exchange Server 2010 at least).
Use Exchange Management Shell to see why the email has not yet been delivered:
- Start Exchange Management Shell
- To view all the messages in the message queue use:
get-queue | get-message
[PS] C:\> get-queue | get-message
Identity FromAddress Status Queue Subject
CRYER\509\710612 brian@cryer... Ready CRYER\509 Enhance...
If you cannot see the message listed then it has probably already been delivered, in which case you don't need to take any further action.
- To view details of the first message in the queue use:
get-queue -identity queue-id | fl
Be sure to use the correct identity ('queue-id') for your queue. For example:
[PS] get-queue -identity CRYER\509 | fl
RunspaceId : 5ab82e82-3093-427b-bb5c-8fa504862672
DeliveryType : DnsConnectorDelivery
NextHopDomain : example.com
NextHopConnector : ece601d0-2275-4f13-b2af-72811f089873
Status : Retry
MessageCount : 1
LastError : 451 4.4.0 DNS query failed
LastErrorTime : 23/06/2016 10:36:38
NextRetryTime : 23/06/2016 10:46:53
DeferredMessageCount : 0
QueueIdentity : CRYER\509
Identity : CRYER\509
IsValid : True
- Look at the "LastError" line from the above. That will indicate what the underlying error is. Resolve that and the email should go.
These notes have been tested with Exchange Server 2010.
About the author: Brian Cryer is a dedicated software developer and webmaster. For his day job he develops websites and desktop applications as well as providing IT services. He moonlights as a technical author and consultant.