Using New Outlook on Windows for professional communication and productivity
Try these checks in order:
- Add at least one recipient in To, Cc, or Bcc. A missing recipient can leave Send unavailable.
- Open the message in its own window instead of the reading pane. In Outlook on the web, drafts can be opened in a separate window by selecting Open in a separate window.
- Verify the mail account is configured in Outlook:
- Go to File > Info > Account Settings > Account Settings.
- On the E-mail tab, confirm the account is listed.
- If it is missing, select New and add the account.
- If the account is listed but Send is still missing or unavailable, remove and add the account again:
- File > Info > Account Settings > Account Settings
- On the E-mail tab, select the account and choose Remove.
- Add it again.
- If the message is stuck in Drafts or Outbox, check for a large attachment. Large attachments are a common cause.
- For Outlook.com, attachments larger than 25 MB must be removed, replaced with a smaller file, or uploaded to OneDrive and sent as a link.
- If the draft is in Drafts, open it there and remove attachments, then try sending again.
- Check mailbox storage. If Microsoft cloud storage is full, sending and receiving mail can stop.
- If using Outlook for Mac, a greyed-out Send button was fixed in build 16.37.20051002.
If the message remains in Drafts, Outlook Web App keeps unsent messages there until they are sent or deleted.
- I can't find the Send button | Microsoft Support
- Create and respond to messages in Outlook Web App | Microsoft Support
- My email message doesn't send | Microsoft Support
- Outlook email stuck | Microsoft Support
- Email stuck in Outlook.com | Microsoft Support
- Send button is greyed out and prevents sending an email | Microsoft Support