

The large size of attachment usually slows down the sending but it can also sometimes completely halt it. Email can get stuck in Outbox if there is a large attachment.Following are some of the common reasons: There could be a number of reasons behind this issue. Reasons Why Outlook Emails Stuck in Outbox Method 4: Using A Professional Outlook Repair Tool.Method 3: Change the Password for Email Account.Method 2: Compress the Size of Attachment.

