Message customization
You can find this section in HostBill Admin → Settings → General Settings → Mail → Message Customization
Available options
Wrap plain text emails
With this option you can create global template to encapsulate all your plain text email.
Message HTML wrapper
You can insert your html code in Message HTML wrapper text area. Remember you need to use {$message} variable inside your template for this option to work correctly.
Inline CSS
With this option enables style blocks in your email templates will be inlined before sending emails. This is required by some email clients that do not allow / parse style tag.
Email Signature
You can create system wide signature that will be appended to each email, except from support related notifications. You can use HTML - just remember that the tags will be removed when signature is added to plain text emails.