How to enable SMTP authentication?

Customizing e-mail programs to enable authentication for outgoing mail (SMTP)

If an encrypted connection is chosen, the server names remain the same. This type of connection is recommended.

We advise against using MS Outlook Express as it is outdated software.

From the Tools/Accounts… menu choose your account and click Properties and then the Servers tab.
Check Server requires authentication – you may also set username and password by clicking the Settings button.
Alternatively, you may still choose the Advanced tab and check the option This server requires… (under the Outgoing mail (SMTP) window) – then the mail transmission will be encrypted.
Confirm new settings OK.

In the menu: Tools / Account configuration, choose Outgoing mail server (SMTP).
Click the Edit button.
Check Use user ID and password and enter your login in the User field.
Alternatively, you may check Use encrypted connection TLS option – then the mail transmission will be encrypted,
Confirm new settings OK.

Attention!
If an encrypted connection is chosen, the server names remain the same. This type of connection is recommended.