How to amend your SMTP port in Microsoft Outlook 2010
Some Internet Service Providers (or ISPs) will routinely block sending mail on the default port 25. To remedy this simply follow the Steps listed below to take you through the process of changing your port to 587 which will allow mail to be sent.
If you would prefer to watch a video on Once you have successfully followed the steps above you should be able to send mail via the outgoing mail server without being blocked by your Internet Service Provider. Click here.
Step 1. Start Microsoft Outlook 2010 then select File, find and select Account Settings, then Account Settings
Step 2. Highlight the corresponding account you want to make changes to the outgoing port for and select Change
Step 3. Now click on More Settings
Step 4. Select the Advanced Tab in the top menu, change the Out Going Server Port to 587 and then click OK
Step 5. Click next
Step 6. Checking it works – Outlook 2010 will test your settings and once complete, click Close
Step 7. Click finish
Step 8. Once finished, Click close
How to amend your SMTP port in Microsoft Outlook 2010
Once you have successfully followed the steps above you should be able to send mail via the outgoing mail server without being blocked by your Internet Service Provider.