Error (0x4803) smtp will not connect

The connection to the server has failed. Account '<account name>', Server: '<SMTP server name>', Protocol: SMTP, Port: 25, Secure (SSL): No, Socket Error: 10051, Error Number: 0x800CCC0E

To resolve this behavior, change the SMTP server for your e-mail account to use the MSN SMTP server. To do this:
1.In Outlook Express, click Accounts on the Tools menu.
2.Click the Mail tab, select the account that you want to change, and then click the Properties button.
3.Click the Servers tab.
4.Under Server Information, delete the entry that is in the Outgoing mail (SMTP) box, and then type smtp.email.msn.com.
5.Under Outgoing Mail Server, click to select the My server requires authentication check box, and then click the Settings button.
6.Under Logon Information, click Log on using.
7.In the Account name box, type you MSN Member ID (everything before the at sign (@) of you MSN e-mail address).
8.In the Password box, type your MSN account password
9.Click to select the Log on using Secure PasswordAuthentication check box.
10.Click OK to close the Outgoing Mail Server dialog box.
11.Click OK to close the <Mail Account> Properties dialog box.
12.Click Close.

hi
Most common reason for 'Outlook cannot connect to SMTP server' error is the wrong configuration settings of Outlook. This happens especially in the case of newly configured email accounts.
A mis-spelled mail server name to a wrong port setting in Outlook can cause connectivity issues to the mail server and end up giving error while trying to send or receive mails.
By default, the port settings for mail related services are these, and a connection problem to these ports can lead to Outlook error:
SMTP - port 25 / 587 POP3 - port 110 IMAP - port 143 Secure SMTP (SSMTP) - port 465 IMAP4 over SSL (IMAPS) - port 993 Secure POP3 (SSL-POP) - port 995 There are also chances that some web masters may have duplicate profiles in Outlook, which will have an old mail server configured in it, and therefore would be trying to connect to the wrong mail server.

Check for a typo in the SMTP server address. You might also try smtp.googlemail.com instead (port 465 SSL). I've seen both used.

You probaly have the SSL box checked in your SMTP settings.

Open Outlook Express.
Click on Tools in the menu, and click on Accounts in the drop-down menu.
Click on Mail.
Double-click mail account.
Click on Advanced.
Outgoing mail (SMTP) should be 25
Box on the left of This server requires secure connection (SSL) should be clear. If not, click on it to clear the check.
Clikc OK button and you should now be able to send emails.

Using Internet Browser access to the Printer/scanner, accessing Network settings, I noticed that the "Connection Test", (below the SMTP Settings), would not go through when SMTP Authentification was set to "ON". Turning it "OFF" allowed the connection test to succeed, but did not change the error code.
However, adding a secondary SMTP Server, allowed it to go through, (leaving SMTP Authentication set to "ON").
Good Luck

According to Yahoo's page that is not the correct server.

You are receiving this error because of one of two reasons:
1) Your email account is not set up properly. Click on Microsoft Outlook, click on Tools, then Accounts. You will see a window with columns stating Account-Type-Connection. If an account is set up then click on it then click on Properties. Click server tab and you will see the SMTP server block and the POP3 server block. Both of these fields will read as follows: pop.XXXXX.net and smtp.XXXXX.net. Your Internet Service Providers name will be in the XXXX. If these are not set up properly then you cannot connect to send email. If they are filled out correctly then you need to call your Internet Service Provider and inform them of your situation. Their server is not working properly.

Don't forget to 4 star this solution.

Check you smtp server settings in admin settings. Verify there correct. If your smtp server needs your email address and password to send, that should be populated as well under them smtp authentication settings.