Whether you use multiple identities with one email account or have set up more than one account, Mozilla Thunderbird and Mozilla usually select the appropriate From: address automatically — usually, but not always. Fortunately, it's easy to change the identity of any email or reply or forward you compose.
More Email Quick Tips
To send a message from a different account or identity in Mozilla Thunderbird or Mozilla:
- Click on the From: drop-down menu while composing the message.
- Select the desired account or identity.
