Re: Why is my Outlook not sending email?
Also, unless one makes settings tweaks, Send/Receive is cyclic, occurring every so many minutes. By default Outlook does not do a Send/Receive upon exit, though it can be set to do so.
Now, it appears that this page is not entirely accessible as one image is a screenshot of the Send/Receive Groups dialog, but there is no discussion in the text of the checkboxes that are part of the dialog. The checkbox that reads, Perform an automatic send/receive when exiting, must be checked if you want that to occur. It is not checked by default.
If this is not set, and you hit Send for a message earlier, but Outlook has not hit the number of minutes to kick off the next send/receive cycle, you will get the message that there are still messages to be sent. If you set it then Outlook does one final send/receive as part of the exit process.
Brian - Windows 10 Home, 64-Bit, Version 1809, Build 17763
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