Unable to send the mail from OutLook - part1

 Try Different SMTP Ports

Typically, SSL and port 465 work most of the time. If you can receive email but can't send any messages in Outlook, double-check that you're using the correct port number.

Sometimes ISPs or network providers block specific ports for security reasons. If the default settings don't work, you can try some alternate ports.

To Change Your Outlook SMTP Port Settings

1. In Microsoft Outlook 2010, click File, and then click Account Settings.
2. Select the account you want to change and click Change.
3. Click More Settings... and select the Advanced tab.
4. Next to Use the following type of encrypted connection, select SSL.
5. Next to Outgoing Server (SMTP), type 465. Click OK and click Next.
6. If those settings don't work,repeat steps 1-3 and select None for Use the following type of encrypted connection. Try these other ports for Outgoing server (SMTP): 80, 3535, 587, or 25.
7. Click OK and Next to see if the other ports will work.