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This article assumes that you have already configured a mailbox using a Krystal cPanel account. To carry out the instructions in this article you will need the Manual Settings for your mailbox. You can obtain these in cPanel > Email Accounts by clicking on the More button next to your mailbox details, and selecting Configure Email Client.
There are now two options for setting up your email client. Option 1 is preferred, but does have some prerequisites.
Option 1 - Use mail.your.domain for inbound and outbound mail server (IMAP Hostname and SMTP Hostname)
Your domain’s A record must be pointing to your Krystal hosting server. If your domain is registered with Krystal then this is likely the case.
You must have SSL enabled for the domain. Once your domain is correctly pointing to Krystal a free LetsEncrypt certificate will be issued automatically.
If you meet these requirements then you can use the format mail.your.domain for the inbound (IMAP Hostname) and outbound (SMTP Hostname) mail servers in the instructions below e.g. if your domain is example.co.uk then you would use mail.example.co.uk as the inbound and outbound mail server names.
This option has the benefit of meaning that should you change hosting servers at any point you won’t need to re-configure any email clients. Once the DNS has updated for your new server A record the clients will continue to be able to send and receive email.
Option 2 - use the server hostname for inbound and outbound mail server
This option has no prerequisites. However, you should be aware that if you use this method, and at a later date change hosting servers you will need to re-configure any email clients.
If you are a reseller this would also impact all your client accounts.
Start the Thunderbird application from the Start Button, or by opening it from the Desktop shortcut.
Click the Create a new account link.
Thunderbird may show a popup window asking if you would like to create a new email address. Because you have already created a mailbox within your cPanel account, you should skip this step. Click the Skip this and use my existing email button.
Click the Continue button.
Thunderbird will attempt to work out what your mail server settings are. However, the settings it guesses are usually no good for secure SSL email, so once you see the following screen, make sure that the IMAP radio button (1) is selected, click the Manual config button.
Step 6 - Entering correct server settings for SSL
On the Mail Account Setup dialog box, Your name, Email address and Password should be automatically filled in. However, the server details will most likely be incorrect. Enter the following :
Click the Done button.
You should now be returned to the Thunderbird main window where you will find your new mailbox ready and waiting. For more information on how to use Thunderbird, please visit
Note : This guide was written using Thunderbird version 17. If you feel this guide is out of date, please let us know!
Step 7 - How to enable SSL if it is not already enabled
The only things you will have to change here are
Again, click OK - That's it - you are now setup for SSL secured email connections.
Step 8 - Problems with IMAP
If there were problems during the setup of your mailbox in Thunderbird, due to bad configuration, then it can sometimes have problems finding the correct IMAP folder namespace. If this happens, you should check that the Advanced server settings are correctly set. Under the mail account in question, click on Server Settings, and then on the right click on the Advanced... button.
Then, make sure that the Personal namespace is configured as shown. Then click OK to save your changes. Thunderbird may need to be restarted for the changes to take effect.