Annoyed by Thunderbird's "Bulk Mail" notification?

I had this problem when configuring my Yahoo mail on (Ubuntu flavoured) Thunderbird.

It seems like that Yahoo groups junk mail into a folder named "Bulk Mail" and for some reason Thunderbird would notifies me each time a new junk mail arrived.

If you have this problem, you might want to try this simple solution:

Get into Thunderbird Preferences:

Thunderbird Preferences
on Ubuntu*

Then, under the Security tab and the Junk sub-tab, and enable the option "Mark messages determined to be Junk as read":

And you're good: no more annoying notifications from even more annoying junk messages.

* Preferences might be located elsewhere in a non LSB certified OS.

Versions by the time of writing:

Ubuntu 14.04

Thunderbird 24.5.0

Thunderbird & Google Calendar read-n-write 2-way sync

Simply follow this Google instructions, which basically says:

0. install Lightning (add-on) in Thunderbird
then

1. Open the Sunbird application and select File > New Calendar.
2. Select On the Network and click Next.
3. Select the CalDAV format option.
4. In the Location field, enter [ https://www.google.com/calendar/dav/ [ your Google Calendar ID ] /events ] and click Next.Your Google Calendar ID for your primary calendar is just your email address, but for all other calendars the Calendar ID will be in the form of [ long string of characters]@group.calendar.google.com. You can get the Calendar ID by clicking the down arrow next to your calendar at calendar.google.com and selecting 'Calendar Settings'.
   
   Be sure to use https in your URL, as an http address will not work.
5. Enter a name and select a color for your calendar.
6. In the pop-up screen, enter the following information:Username: This is the complete email address you use with Google Calendar (including the part after the @ sign). If you're using Google Apps, be sure to enter your Google Apps email address.
   Password: This is the password you use to sign in to Google Calendar
7. Click OK.

Instructions were made originally for Mozilla Sunbird, but also work with Thunderbird+Lightning, although considered an experimental feature.