Email Delivery
Why Business Emails May Not Be Sending
Quick Answer
Outgoing email typically fails to send due to account-level sending limits, an incorrectly configured send-as alias, or authentication problems (SPF/DKIM) that cause the receiving server to reject the message after it appears to send.
It helps to separate two different failure modes: mail that never leaves Gmail at all (an error appears immediately), and mail that appears to send but bounces back later (an authentication or reputation issue on the receiving end).
Common Causes
- A daily sending limit reached, especially on newer or recently migrated accounts.
- An incorrectly configured send-as alias.
- Missing or misconfigured SPF/DKIM causing rejections at the receiving server.
- A suspended or restricted user account.
Safe Troubleshooting Steps
- Note whether the failure happens immediately in Gmail or later as a bounce-back.
- Check the Admin console for account restrictions or sending limits.
- If sending "as" an alias, confirm it is configured correctly at both the Gmail and Admin console level.
- Review SPF and DKIM if messages bounce back from specific recipients only.
What to Verify
- The account is active and not restricted in the Admin console.
- Send-as aliases are configured correctly if used.
- SPF and DKIM pass on a test message.
When Professional Help May Be Useful
If sending fails inconsistently - working for some recipients but not others - that pattern usually points to an authentication issue worth reviewing directly rather than guessing recipient by recipient.