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Issues Sending or Receiving Emails
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  2. Troubleshooting
  3. Issues Sending or Receiving Emails
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  • Emails fail to send / Sending error/ Emails stay in drafts
  • "User is authenticated but not connected" issue with Outlook accounts
  • Loading is taking longer than usual - error message
  • Too many simultaneous connections
  • Message blocked due to spam content in the message
  • Configuring SPF and DKIM records
  • How to prevent Windows 11 Defender from blocking Mailbird
  • How to prevent Windows 10 Defender from blocking Mailbird
  • Request is throttled. Suggested backoff time - Error
  • Microsoft 365 - SMTP authentication unsuccessful error when sending emails
  • Yahoo/AOL/AT&T/Verizon account is not downloading or syncing messages
  • When I reply to an email, it disappears from my Inbox. Why?
  • I can't receive or send emails anymore
  • Server authentication failed
  • AOL will not accept delivery of this message - Error Message 521 5.2.1
  • Issues sending emails from a Google Workspace domain alias
  • Long delay in receiving or syncing incoming emails
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