Activate secure TLS communication on email inbox • Thunderbird
Step 1
In the Thunderbird menu bar, go to the menu item 'Tools', drop-down and click on 'Account Settings'.
![](/files/styles/medium/public/inline-images/Thunderbird_TLS_1.png?itok=UknSgxrW)
Step 2
In the left bar where the configured addresses are listed, go to 'Server settings' for your address/ account.
(If necessary, click on your address/ account to expand the menu settings under your address to see 'Server settings', 'Copies & Folder' etc.)
![](/files/styles/medium/public/inline-images/Thunderbird_TLS_2.png?itok=hKTOPdX2)
Step 3
On the right, at 'Security settings' section, select 'STARTTLS' as connection security.
![](/files/styles/medium/public/inline-images/Thunderbird_TLS_3.png?itok=iITmW5wL)
Step 4
Again in the left menu bar, open 'Outgoing Server(SMTP)'.
![](/files/styles/medium/public/inline-images/Thunderbird_TLS_5.png?itok=Zb0eIeP4)
Step 5
On the right, select Restena’s SMTP server 'smtp.restena.lu' and click on 'Edit'.
![](/files/styles/medium/public/inline-images/Thunderbird_TLS_6.png?itok=vKy1prHq)
Step 6
- Under 'Security and Authentication', at 'Connection security', select 'STARTTLS'.
- Press 'OK' to save the option.
![](/files/styles/medium/public/inline-images/Thunderbird_TLS_7.png?itok=Q8dPrxsI)
![](/files/styles/medium/public/inline-images/Thunderbird_TLS_8.png?itok=PuZDAym6)
![](/files/styles/medium/public/inline-images/Thunderbird_TLS_9.png?itok=_biRrqkK)
Step 7
Close the 'Account settings'.