Fix SMTP Server error in Email

An SMTP Server error (such as number 0x800CCC79) can be caused by an error in the setup in your email client program (Outlook Express or Outlook) for the outgoing (SMTP) mail server. A mistake in the username, password, server address, or server authentication can produce this error message when attempting to send an email. To correct this error, you need to know from your email provider what type of authentication, if any, is required by their mail server.

To verify your existing SMTP server settings:

  1. Open your email client program (Outlook Express, Outlook, Eudora or Windows Mail)
  2. Click "Accounts" in the "Tools" menu
  3. Click on your email account then click "Properties" button
  4. Click "General" tab
  5. Ensure that the "E-mail address" is your valid address for this account
  6. Click "Servers" tab
  7. Verify your account name is complete and its password is correct for this account
  8. Un-check "Log on using Secure Password Authentication" (unless specified otherwise by your email provider)
  9. Check or uncheck (as directed by your email provider )"My Server requires authentication". If authentication is required by your provider, click the Settings button. On the "Logon Info" screen, select as specified by your email provider, either
  10. "Use same settings as my incoming mail server"; or
  11. "Log on using" and enter the specified Account Name and Password.
  12. Delete messages in the "Outbox" folder and send your email message again.

Note: To setup or verify all your email settings, follow the instructions at Setup and Use Email Service .

Fix Common Gmail Pop3 Errors

Repeatedly prompted for your username and password or 'invalid credentials' error.

Fix: Enable POP in Gmail as follows:

  1. Sign in to Gmail.
  2. Click the gear icon in the upper right, then select Settings.
  3. Click Forwarding and POP/IMAP.
  4. Select Enable POP for all mail or Enable POP for mail that arrives from now on.
  5. Choose what to do with your messages after your POP client or device receives them.
  6. Click Save Changes.

The connection to the server has failed. Account: 'Gmail', Server: 'pop.gmail.com', Protocol: POP3, Port: 110, Secure(SSL): Yes, Socket Error: 10060, Error Number: 0x800CCC0E.

Fix: On the "Advanced" tab of your POP email client program (such as Outlook, Windows Live Mail, Outlook Express, or Thunderbird), set "Incoming mail (POP3):" to 995.

The message could not be sent because the server rejected the sender's e-mail address. The sender's e-mail address was 'email'. Subject 'example', Account: 'pop.gmail.com', Server: 'smtp.gmail.com', Protocol: SMTP, Server Response: '530 5.5.1 Authentication Required f45sm8616pyh', Port: 25, Secure(SSL): Yes, Server Error: 530, Error Number: 0x800CCC78.

Fix: On the Servers tab of your POP email client program, enable My server requires authentication beneath Outgoing Mail Server.

Your server has unexpectedly terminated the connection. Possible causes for this include server problems, network problems, or a long period of inactivity. Account: 'pop.gmail.com', Server: 'pop.gmail.com', Protocol: POP3, Port: 995, Secure(SSL): No, Error Number: 0x800CCC0F.

Fix: On the Advanced tab of your POP email client program, enable This server requires an encrypted connection (SSL) for the POP server.

Your SMTP3 server has not responded in 60 seconds. Would you like to wait another 60 seconds for the server to respond? A time-out occurred while communicating with the server. Account: ' pop.gmail.com', Server: 'smtp.gmail.com', Protocol: SMTP, Port: 465, Secure(SSL): No, Error Number: 0x800CCC19.

Fix: On the Advanced tab of your POP email client program, enable This server requires an encrypted connection (SSL) for the SMTP server.

The host 'smpt.gmail.com' could not be found. Please verify that you have entered the server name correctly. Account: 'pop.gmail.com', Server: 'smpt.gmail.com', Protocol: SMTP, Port: 465, Secure(SSL): Yes, Socket Error: 11001, Error Number: 0x800CCC0D.

Fix: On the Servers tab, change smpt.gmail.com to smtp.gmail.com

An unknown error has occurred. Account: 'Gmail', Server: 'pop.gmail.com', Protocol: POP3, Port: 995, Secure(SSL): Yes, Error Number: 0x800C0133.

Fix: In your POP email client program, click File > Folder > Compress All Folders.

Note: To setup or verify all your email settings, follow the instructions at Setup and Use Email Service.