01.

Open Thunderbird Settings

Open Thunderbird

Click on the ⚙️ gear icon (lower left) for Settings.

02.

Open Account Settings

Click on Account Settings (lower left)

03.

Edit Incoming Settings

Click on Server Settings under your account

Find Server Name and change jupiter.hostmother.com to

cpanel.pccc.com

04.

Navigate to Outgoing Server Settings

In the left sidebar click on Outgoing Server (SMTP)

Select your account from the list, there may only be one.

Click Edit

05.

Edit Outgoing Settings

Find Server Name and change jupiter.hostmother.com to

cpanel.pccc.com

Click Ok to submit changes.