Within Outlook, click Tools > Account Settings
Select your Email account from the list, then click Change
Click More Settings
Check the My outgoing server (SMTP) requires authentication box
Make sure that Use same settings as my incoming mail server is selected
Click the Advanced tab
Change the Outgoing Server field number from 25 to 465 or 587
Click OK
Click Next until you reach the Finish button
Emails not working with Safe Browsing (VPN)
For a small set of users they may experience issues trying to use Email when connected to our VPN. We’re not alone, most VPN providers block port 25.
Whilst we acknowledge it can be frustrating to our customers, it would cause widespread disruption to our service and even cause blacklisting of our servers.
You can still send and receive emails whilst connected to Scanguard's Safe Browsing (VPN) and it’s extremely simple.
Most, if not all email applications will allow you to use a different port. You can change your SMTP server settings to use port 465 or 587 and you’ll be able to send and receive emails again. It’ll only take a few minutes max.
Within Outlook Express, click Tools > Accounts
Click the Mail tab
Select your email account from the list, then click the Properties button
Make sure the Include this account when receiving mail or synchronizing box is checked
Click the Servers tab, locate the Settings button below Outgoing Mail Server and click it
Locate the SMTP Port field (it should say 25). Change the 25 to either 465 or 587
Make sure the My SMTP server requires authentication box is checked
Click OK, then click OK again until all dialogue Windows are closed
Restart Outlook Express
Within Thunderbird, click Tools > Account Settings
Select Outgoing Server (SMTP) on the left pane of the Account Settings window
Change the number in the Port field to 465 or 587
Click OK
Click OK again to close the Account settings window
Within Mail, click Preferences in the Mail menu
Click the Accounts tab to locate your account and open it
Open the Outgoing Mail Server window
Change the number in the Port field to 465 or 587
Set the Encryption Method to TLS
Check the Use Authentication box
Click Continue
Click Continue again then close any remaining windows
Tap the Settings icon
Tap Mail > Contacts >Calendars
On accounts, choose the account you wish to change the port for
Tap Account
Tap SMTP under Outgoing mail server
Tap your Primary server
On the bottom, tap Server port
Change the port from 25 to 465 or 587
Tap Done