Thunderbird allows you to send emails. It is simple since you do not need to manually log in to cPanel webmail. You can use the Mozilla Thunderbird email software to send an email directly.
1. Open Mozilla Thunderbird.
2. On the left side of the top menu, click on Write.
If you have multiple email accounts, click on your account, and a drop-down menu will open. Then select the appropriate email and enter the email account of the person you want to send an email to in the To field.
In the subject field, enter the subject of your email, enter your message in the Message box, and then click on Send.