I get an "Error Verifying To" when I try to send from SMTP.
- Edit the account by right-clicking on it in the Accounts list, and select "Edit"
- Select the "Send Mail" tab
- Enable the option, "Server Requires Authentication"
- If your authentication requires a different login than your incoming (pop3/imap) server settings, press the "Settings" button to configure the name and password
- Press Update
This typically means that you need to enable SMTP Authentication for the account. Here's how: