Simple site recommendation script with lots of extra features for those who want them & no required configuration!

Features of PBL Tell A Friend:
- Nothing in the script needs to be modified unless you want advanced options!
- Prevent servers, not given access, permission from being recommended!
- Control how many people the user may recommend at a time
- Verifies that all email addresses processed are valid
- Enable an optional log (requires mySQL) to monitor all activity with the script
- Add additional
-invisible
- text which is added to all emails sent recommending sites but not displayed in the message text the user submits
- Control the added text and default message text in simple text files
- Template support; totally control the theme and appearance of the script!
- Dynamic URL recommending. Capable of recommending one fixed URL or dynamic URLs passed in the query string and via HTTP_REFERER!
- Control font family, size & color