We can see the mails stuck in the Outbox in Exchange Online and are able to send them again without error. It's a Cloud environment (we just migrated form Notes to Office 365).
Outlook email gets stuck in outbox office 365 windows#
You have the following data configured in the Windows registry: Outlook 2013, Outlook 2010 or. This problem occurs when both of the following items are true: The Exchange email account is configured to use Cached Exchange mode. This issue does not occur when you start Outlook in Safe mode. Instead, it remains in your Outbox folder.When this problem occurs, the message remains in your Outbox folder until you manually initiate a Send/Receive operation (for example, press F9 or select send or receive) When you send an e-mail message in Microsoft Outlook, the message may remain in your Outbox folder as shown in the following figure.After that, resent the email and check whether the error Outlook emails stuck in outbox is solved So, you need to check the Outlook internet connection. In this situation, you will come across the error of Outlook outbox not sending. If the Outlook is offline, you will see a status of Disconnected or Trying to Connect in the status bar at the bottom of your Outlook message. In order to fix the error of Outlook messages stuck in outbox, you can check whether the Outlook is online first.Is your message being slowed down by a large attachment Are you sure your mail is supposed to send immediately? If you've set a rule to delay message sending, you will see your mail in the outbox for awhile. utes to make sure it's not a momentary O365 outage, and try again.Note This stops Outlook from trying to send all email messages. I wonder if you tried to send email with large attachment in Outlook with your Outlook, please tried to the following steps to remove the stuck email from Outbox to see if it helps: In Outlook, select the Send/Receive tab, and then select Work Offline.Throw new EmailLibraryException(, "One or more recipients are invalid (use OutlookMailEngine64.Home Outlook 365 mails stuck in outbox Email stuck in Outbox - Outlook 2016 O365 - Microsoft (address).Type = 3 įoreach (.Recipient recipient in outlookMailItem.Recipients) OutlookMailItem.ReadReceiptRequested = requestReadReceipt MailItem outlookMailItem = (.MailItem)application.CreateItem(.OlItemType.olMailItem) Session = GetSessionAndLogon(log) //TODO: I'm creating a 2nd session here which is wasteful NameSpace namespaceMAPI = application.GetNamespace("MAPI") Application application = new .Application() This method was added because sometimes messages were getting stuck in the Outlook Outbox and this seems to solve that Here is the updated version of my method so you can see the changes: private static bool SendSafeMessage(Recipients recipients, string addressListReplyTo, string subject, string body, string attachments, bool requestReadReceipt, Log log, bool isHtmlBody = false) The solution for me was to swap out RDO for the SafeMailItem object. Throw new EmailLibraryException(, "One or more recipients are invalid (use OutlookMailEngine64.ValidateAddresses first)", ex) ĭmitry worked with me via email. String message = "Error while sending email: " + ex.Message If (!OutlookMailEngine64.existsName(recipient.Name, session, log = null ? null : log))Ĭatch ( ex) Mail.ReadReceiptRequested = requestReadReceipt įoreach (string attachment in attachments)įoreach (string address in addressListReplyTo)įoreach (string address in recipients.To)įoreach (string address in recipients.Cc)įoreach (string address in recipients.Bcc)įoreach (RDORecipient recipient in mail.Recipients) public static bool SendMessage(Recipients recipients, string addressListReplyTo, string subject, string body, string attachments, bool requestReadReceipt, Log log, bool isHtmlBody = false)įolder = session.GetDefaultFolder(rdoDefaultFolders.olFolderOutbox) This seems important, but I'm not sure what I can do about that.Īlso, hitting Send/Receive All Folders does not help. I also noticed that the emails in his outbox have what appears to be the 'draft' symbol on them, while in my outbox they have a 'sending' symbol on them. I'll try that soon, but the changelog doesn't mention mail getting stuck in the Outbox. I upgraded them to the the newest version of Outlook Redmeption at the time (released May 07, 2016), though it looks like they just came out with a new version a few days ago. If they use an old version of Outlook (2010) this is not a problem. If he double clicks the message (so it pops up in Outlook) he can hit the send button and it will sucessfuly send. When he sends an email in our program via Outlook Redemption (a third party program used for Outlook integration), the mail gets stuck in his outbox. My customer and I are using Office 365 with Outlook 2016 installed. This problem is happening for one of our customers and I have been unable to replicate on my side using the same version of Outlook.
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