You do not have the permission to send the message on behalf of the specified user.". I sent a new email message to someone yesterday from Outlook 2016 using the -connected account that uses the Exchange mailbox (i.e., "Outlook_<16 letter and digit and I received an undeliverable mail notification: "This message could not be sent. I have one more related issue that I just discovered earlier today. But ever since Microsoft went to using Exchange mailboxes for, I've been having nothing but problems with it. I've used Outlook since the first version was released many years ago and have always liked it very much. I have spent countless hours and days trying to resolve these issues. Spectrum email setup for outlook how to#I have no idea how to troubleshoot this issue. I am not aware of ANY changes that were made on or about October that might have caused this problem. So why is only returning the messages on and before October 10. The Outlook 2016 account settings also include a few additional non-essential settings including those for testing the account setup.īoth my Outlook 2016 and IMAP account settings are setup identically (at least as far as I can tell). has a single Encryption dropdown box for the incoming server (which is set to "None" for Spectrum) and no such setting for the outgoing server while Outlook 2016 has a dropdown "Encryption" box for each server (which are both set to "None" for Spectrum). has a drop-down box for "Authentication" (I'm using "Basic" for Spectrum) while Outlook 2016 has a checkbox for "My outgoing server (SMTP) requires authentication" (which is checked for Spectrum). They both, of course, ask for the incoming (IMAP) and outgoing (SMTP) server names (which, in my case for Spectrum Cable, both are "" ) and the ports (for Spectrum, it's 143 for incoming and 587 for outgoing). The information needed is just organized differently and more thorough in Outlook 2016. The account settings in Outlook 2016 are just a bit different than in. Thank you.Īs far as I know (or can tell), nothing changed on October 10. Any help in resolving it would be greatly appreciated. This issue has been driving me nuts for weeks. I have used for years without any issue - until recently. How can the Outlook 2016 IMAP connection to my Spectrum email account return all of my Spectrum messages while the IMAP connection to this same account only returns the messages through October 10? Both IMAP connections are set up as close as possible to each other (although the selection choices are not quite the same in the two different IMAP settings). However, if I add my Spectrum email account directly to Outlook 2016 as an IMAP connection, it returns ALL of my Spectrum email messages up to, and including, the most current ones. Obviously, it returns the same messages that returns, missing all messages after October 10. I primarily use Outlook 2016 (through Office 365 Home) with my account. I removed the Spectrum connection and re-added it with the same result. It does not return any messages after October 10. Over the past few weeks, it no longer returns the most recent email messages from my Spectrum account. My account connects to my Spectrum (formerly Time-Warner) email account using IMAP.
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