In this post, we will discuss what to do if an Email gets stuck in the Outlook app’s outbox. Emails stuck in Outbox of Outlook app If your email is stuck in the Outbox of the Outlook app ...

an oversized local cache (OST), and several other factors can prevent Outlook from synchronizing Inbox or Outbox emails with the Exchange server, leading to Outlook being stuck on updating folders.

Still, it has problems. Outgoing emails are temporarily stored in your Gmail account's Outbox folder before they're sent.