In Ubuntu when new mail arrives Evolution changes message indicator to green color. I have migrated from Evolution to Thunderbird and that is why looking for how to make Thunderbird react like Evolution once a new mail arrives.
UPDATE 1
I have forgotten to note that I don't have administrator privileges in my working computer.
Thanks
There is an extension that integrates Thunderbird with the Ubuntu Messaging menu (and also provides NotifyOSD notifications) that comes in a PPA. Here's a screenshot:
To install it in Ubuntu, use the following commands:
You'll then find it in the Thunderbird extensions. The PPA provides packages for Ubuntu 10.10 and 11.04, though the 11.04 version is a bit more advanced and allows you only display notifications for messages that arrive in a certain folder, etc.
There was also an add-on for Thunderbird, based on the above extension, but it has since been removed.
Or you can use popper. This is an e-mail checker applications, and it can start Thunderbird too.
In latest releases of Ubuntu - 12.04 and later, Thunderbird is default mail-client and by default, notifies of new mail.
So, I would suggest upgrading to 12.04 or 12.10.
For details on how to configure notifications for selected Folders in Thunderbird please refer to this post.
Not exactly what you need but I have used this addon of thunderbird which minimizes to tray and gives pop up notification for new messages.