Start by clicking on Email to create a new Email account if you are setting up Thunderbird for the first time, or have no other email accounts already created.
Then select Skip this and use my existing email.
Alternatively, you can access the Options and then Account Settings by clicking on the Menu button near the top right corner of the Thunderbird window.
On the following screen, select the Account Actions menu at the bottom right and choose to Add Mail Account.
Either path should lead you to the Mail Account Setup screen.
Enter your name as you would like it to appear when you send mail, your full Execulink provided email address and password. Once all that is entered, click on Continue.
Thunderbird will then attempt to locate the configuration for the Incoming and Outgoing server names and settings for Execulink. What Thunderbird comes up with will need a slight modification.
Click on Manual config.
Here, you can specify The Incoming Server Hostname as sslmail.execulink.com on Port 995, the Outgoing Server Hostname also as sslmail.execulink.com on Port 465, and the Username as your Email address in full. The encryption type SSL/TLS should be automatically set once you specify the Execulink SSL email server. Once this is completed, click on Done.
This completed your Email account setup. A good method to test the Incoming and Outgoing settings is to send yourself an Email. Once you have sent it, click on Get Mail located at the top right corner to download messages waiting for you.