When the message was actually already submitted to the mail server but the acknowledgement was not received before the timeout was reached, the message will be submitted again and thus create a duplicate as well. In that case, Outlook will resubmit any message in the Outbox upon the next Send/Receive interval. When you are on a slow or unreliable connection or a connection with a high latency (like mobile connections), then it could be that you reach this timeout.
This basically tells Outlook when to consider a connection as “lost” when no server responds has been received after a configured amount of time.īy default, this is 1 minute. POP3 and IMAP accounts work with Server Timeouts. When you have 3 or more accounts configured, it is recommended not to set it lower than 10 minutes.Ĭhecking for new emails too often could interfere with the sending process. As mentioned before, don’t set it lower than 5 minutes. File-> Options-> Advanced-> Send/Receive….To change your Send/Receive interval go to: When an account is listed more than that, your send/receive interval is too short.
You should only see up to 2 tasks per mail account in this dialog. You can open the Send/Receive Progress dialog to see if there is a backlog: In the worst case scenario, it could be that the message still in the Outbox will get resubmitted for sending and thus create a duplicate. This will then cause a backlog of Send/Receive tasks which still need to be completed. When your send/receive interval is set to a very short period (below 5 minutes) and your message takes a while to upload to the mail server, it could be that the next send/receive interval already started before the previous one completes.
#Outlook for mac won't stop sending too large file how to#
For steps on how to properly disable the integration, see the documentation for your virus scanner.įor more background information see " Duplicate E-mails" and " Disable virus scanner integration?". This will not put you at risk in any way. It is really recommended to disable or uninstall your virus scanner’s Outlook integration capabilities. Throughout the years, virus scanners have proven over and over again to cause more issues than they claim to solve in Outlook. When you have a virus scanner installed which integrates itself with Outlook, it will scan outgoing emails as well. Resetting your modem, router, hub, WiFi Access Point and/or other network appliances may sometimes already be the answer too even when all other network connections seem OK. In some cases, especially when you have a slow connection to your mail host, extending the mail server time-out may solve it as well. This often happens when you are using a virus scanner that integrates with Outlook or when your Send/Receive interval is set to a very short time. How can I solve this and make sure Outlook only sends out one copy again? It will send it 20-30 times but keeps the email in my Outbox saying that it hasn't been sent (although sometimes it says it's been sent but stays in the Outbox).
It doesn't happen with every email with attachments, just occasionally. I'm having a problem with Outlook sending multiple copies of some emails - usually those with attachments.
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