Mozilla Thunderbird - IMAP 

Mozilla Thunderbird is a free to download email client designed by the not for profit Mozilla Foundation. It is the most popular free to download email client outside of those provided by Microsoft and Apple and is widely used throughout the world. 

Step by Step Guide 

Open Thunderbird and select 'Tools' and then 'Account Settings' as shown in the screen grab image. In the Account Settings menu find the 'Account Actions' drop down menu in the bottom left hand corner. From this drop down menu choose 'Add Mail Account'
On the next menu insert the name you wish to be referred as when using your account, your full email address e.g and the password that we have provided you with. Click the 'Continue' button and a 'Manual Config' button should appear to the left of it, click on this. 
You will now be presented with a window like the one above. Ensure that your settings look similar to the above screen grab. Your incoming mail should be 'IMAP' and the server host name should mail.yourdomain (the example in the screen grab is for the domain, insert your own domain instead). The port for incoming mail is 993. 'SSL/TLS' should be turned on and 'Authentication' should be set to 'normal password'. 
For outgoing mail sure that the 'Server host name' is smtp.yourdomain and the port is 465. As with the incoming server, 'SSL/TLS' should be turned on and 'Authentication' should be set to 'normal password'
Please note that mail2/smtp2 may be used instead, refer to the email you received with your user name and password to discover which setting you should use. 
Click on 'Advanced Config' and this will bring up a menu like above and then 'Server Settings' and change the 'Check for messages every' value to a time span that suits your needs and also 'Leave Messages on Server' if you're accessing your mailbox through multiple devices then click OK. 
You'll now be returned to the previous window, finish creating the account and you should now receive an error message the one above informing you that the servers do not use encryption. Click on the 'I understand the risks' check box and then 'Done'
Your new email account should now be ready to use. 
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