Gmail一直收到mail delivery subsystem

A frustrating issue! 😞

The "Mail delivery subsystem" error in Gmail is usually a temporary issue and can be caused by various factors. Here are some possible solutions to help you resolve the issue:

  1. Check your email account settings: Ensure that your email account settings are correct, including your username, password, and SMTP settings.
  2. Verify your email address: Make sure that the email address you're trying to send from is valid and not blocked by Gmail.
  3. Check your email client: If you're using an email client like Microsoft Outlook or Mozilla Thunderbird, try switching to the Gmail web interface to see if the issue persists.
  4. Clear your browser cache: Clearing your browser cache and cookies may resolve the issue. Try using a different browser or incognito mode to see if the issue persists.
  5. Check for spam filters: If you have a spam filter enabled, it may be blocking the email. Try disabling the spam filter temporarily to see if the issue resolves.
  6. Check your email content: Ensure that your email content is not too large or contains any suspicious attachments that may be causing the issue.
  7. Try sending a test email: Send a test email to yourself or a different email address to see if the issue is specific to the recipient or the sending email.
  8. Check for Gmail outages: Occasionally, Gmail may experience outages or maintenance issues. Check the Gmail status page to see if there are any known issues.
  9. Contact your email provider: If you're using a third-party email provider, contact their support team to see if there are any issues on their end.
  10. Wait it out: If none of the above solutions work, try waiting for a few hours and then try sending the email again. The issue may resolve itself.

If you're still experiencing issues, you can try contacting Gmail support for further assistance.