I thought I had turned error reporting on in the php.ini, but I guess not. Adding that to the top gave me this error:
Strict Standards: Only variables should be assigned by reference in /var/www/html/webassist/email/PEAR_Mail_using_SMTP_php.php on line 190
Fatal error: Class 'Net_SMTP' not found in /usr/share/pear/Mail/smtp.php on line 366