Open the email in the Drafts folder and click Send. if you’ve attached a large file to your email message, you may see it sitting in the outbox because it’s simply taking a while to send, and it may be blocking all subsequent emails from sending.ģ: send an email again, move the email from Outbox to Drafts folder. Now activate Outlook once again by clicking 'Online/ Offline' button.Ģ: Remove the attachment of the email. To troubleshoot your issue, please try these methods one by one:ġ: Check your connection, make sure your outlook is connected at the lower-right corner of the Outlook window.