User Identities in Thunderbird

Thunderbird have see lots of changes but the basic features for email have been retained. One of this, is being able to choose different ways to compose a message before it is sent out.

Example case 1; I have different signatures for friends, customers, special clients and for the general use. Switching signatures is so easy.

Example case 2; Some sent emails must be save to my SPECIAL folder.

Example case 3: Some emails must contain a CC or BCC to specific persons.

Example case 4: When I replay some quote of previous email is at the top and some at the bottom.

We can get this done is a few simple steps (I list the general steps here);

Step 1: In TB, click Tools ->Account settings...
Select the Email account and set the default email settings for

Your name:
Email Address:
Reply-to Address:
Organization:
Signature Text:

Step 2: Strongly suggest to create a text file and place the signature and name. 
Use the option for
Attach the signature from a file instead (text, HTML, or image)

Step 3: Configure following settings;
Copies and folders
Composition & Addressing
Security

Step 4: Click the Email account (selected in step 1)
Click button Manage Identities...
Click Add...

Enter the alternative email configuration. E.g. The alternative email signature.

Click OK, Close. You can continue to create as many identities as you like.
Click OK

DONE!
Try to send an email, click Write button.

Notice the "From" have a drop down list of all the different styles and configuration that you have created.