Can PHP route Sendmail to a MYSQL DB ?

I need to specific emails to insert directly into a mysql database The server uses sendmail/php/mysql Essentially, all emails sent TO and FROM 'salesrep@company.com' are emailed normally and, then, inserted into the company_email database. Is there something out there that already does this...like a php class with some sendmail scripts ? many thanks as I wanted to see if the wheel had already been invented g