How do I create multiple accounts in Mozilla Thunderbird?

I asked Thunderbird fan Jeff Lawley for his thoughts on this, and here's his splendid tutorial on the subject:

I use Thunderbird for this when setting up email for friends who have more than one POP account, especially if they have no need for the calendar function in Microsoft Outlook. There have been many times where I have come across individuals who are frustrated because they cannot set up more than one email account in Outlook Express, and they don't want to bother with Outlook, so it's nice to have an alternative!

Thunderbird has proven easier for many of my friends who have multiple email accounts to use, with an added bonus of being free, which everyone seems to appreciate.

Here's how I suggest you create multiple accounts:

1. Download Thunderbird. The current version as of this writing is 1.0.7.

2. Install Thunderbird. It will import many settings and addresses from other programs, including Outlook Express and Eudora.

3. If you imported from Outlook express, than you already have one email account set up. Go to Tools --> Account Settings. There will be one account set up already, if you imported settings. If not, you will need to set up a new account (see number 4).

4. Set up your second (or first) account. Select "Add Account" near the bottom. Select "email account," then NEXT. Enter your name and your email address, then NEXT. Select the type of server (usually POP for commercial accounts), and type in the name of the incoming server. This will be available on support pages for nearly all ISPs.

IMPORTANT!!!! Be sure that "use Global Inbox" is UNCHECKED. Otherwise, all incoming email from all email accounts will go into the same Inbox. Of course, if this is okay with you, then certainly leave it checked.

Once you have determined your Inbox preference, hit NEXT. Input the user name for the email account, then NEXT. Create the name that you want (this does not matter, and should be recognizable to you), then NEXT. If everything is right, hit FINISH.

5. If there was an email account imported from another program, and you want to have separate inboxes, then go to Tools --> Account Settings, hit the plus sign next to the email account to open the menu, select Server Settings, then advanced. Select the POP tab, and select "Inbox for this server's account." If you have separate SMTP servers for each account, you can also create and select them for each account on this screen. Hit OK, then OK again.

6. Note that the default SMTP server will be the one on the first email account. You will have to input one during account setup if no email settings were imported from another program.

7. When you are creating a new email message, there will be a pulldown menu on the "From" line. You can select which email address will be your reply-to address here. Generally, Thunderbird will default to whichever address you are using (which Inbox you are in) at that particular time. So pay attention!

That's all there is to it!