Your emails might get stuck in your outbox without reaching their destination due to overly large attachments.

Many factors contribute to your outlook not sending emails from the outbox. You might see queries like 'error messages' after you attempt to send a message. When messages get trapped in outlook, the messages take a lot of time during sending and might eventually return unsent. So you probably are not the only one reading this article and it likes presently. Why Do Emails Go To Outbox But Not Sending?įor many outlook users mail not sending and getting jammed in the outbox is a very common thing.

Part 3: How to Repair Corrupt PST Files?.

Part 2: How to Fix 'Outlook Outbox Not Sending' Error?.

Part 1: Why Do Emails Go To Outbox But Not Sending?.

So to be clear his login name is also created a domain suffix the same as the domain name of the e-mail address.Įverything is up to date. I think this has something to do with the AD login name. But when he clicks the inbox of and then clicks theĬalendar, none of the calendars of his co-workers, are working and sometimes Outlook force closes. When he clicks on his inbox and then clicks on the calendar all his connected calendars (of co-workers) are working fine. There is also a strange issue of calendar rights. This person also has a secondary mailbox which resided in the same Office 365 tenant) and these credentials are also present in the Windows Vault. If I recreate the profile the mails get sent out of the Outbox and Outlook says 'Online 'Connected to Microsoft Exchange'.Īlso they have Azure AD Connect and use their e-mail-address and login name (so for instance domain name - mail address in Office 365 is also the login for the local AD on prem they use to login. Also Outlook says 'Online' instead of 'Online with Microsoft Exchange' The mail is stuck in the outbox and strangest thing is F9 'does not work' it seems like Send and receive (SRS) corruption or somethinge like that. The customer has roaming profiles with redirect folders Temporarely but after a few weeks the problem comes back. This is a dutch Outlook so if you need a translation. Things such as new profile for Outlook or Windows I already tried, outlook /resetnavpane also.

Also we do not would like to upgrade yet because there are running multiple vm's on this host. We checked the host and the hardware is healthy.

They are running on a VMWARE ESXI 5.1 Host. The other three is the clustered terminal server environment.Īll servers are running on Windows Server 2012 R2 fully patched. The first one is the domain controller, which also contains the filesystem and the Azure AD Connect. He has a clustered terminal server environment with a RDP broker (Windows Internal Database on the domaincontroller) A customer of mine has the below problem.

Mail stuck in outbox office 365