Enable SMTP authentication for Outlook 2010-2016
Enabling SMTP authentication
- Open Outlook
- Click on the Yellow Files menu tab and select Account Settings. The Account Settings box appears.
- Verify that the E-mail tab is selected. Your email account appears, it might be labeled with your name of domain.
- Click on the account to highlight it, and click on the Change icon above it. The Internet E-mail Settings appear.
- Under the Server Information section, in the box marked Outgoing mail server (SMTP) check that it is set to your Plesk server name (psaXXX.his.com) or Zimbra server name (xxx.his.com)
- Click the button More Settings... in the lower right-hand corner. The Internet Email Settings box appears.
- Click on the tab Outgoing Server.
- Click the check box My outgoing server (SMTP) requires authentication, and verify that the box Use same settings as my incoming mail server is selected.
- Click the Advanced tab
- Change the Outgoing server (SMTP) from 25 to 465 *. Click OK.
- Make Sure Encryption is set SSL/TLS for port 465
- Click OK to close the Internet Email Settings box.
- Click the Next button to test your settings.
Click the Finish button to close the Internet E-mail Settings box.
Click the Close button to close the Account Settings box. SMTP authentication has now been enabled.
An increasing number of cable and DSL providers (Comcast, Cox, Roadrunner, Verizon, etc...) are blocking the default SMTP port 25 except for their own mail servers. This is being done to help reduce the amount of spam sent from infected customer PCs.
Symptoms: you get an error sending mail, saying "could not connect to
Solution:In order to send email through your HIS mail server from your cable/DSL account you will need to use use port 465 with SSL.