There is draft in the distribution box
To release an email stuck in your Drafts or Outbox folder, select one of the sections below. After you remove the attachment, click Send/Receive > Work Offline to deselect the button and resume working online. If the message has an attachment that's larger than 25MB, delete the attachment and either attach a smaller file or upload the file to OneDrive and then attach a link to the attachment.
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