One of Thunderbird's unique features is that you can easily manage multiple email accounts. Using Thunderbird's Manage Identities feature, you can manipulate your "From" address when composing or replying to mail by just selecting the address you want to use from the drop-down list, as shown in Figure 10-10. This can be done on a per-account basis, so you can actually create a unique identity for each of your accounts.
Figure 10-10. Thunderbird's Multiple Identity drop-down list.
To create or edit a mail identity for an account, do the following:
Remember, you can create different identities for each email account, something even Dr. Jekyll would have enjoyed.