A certified email system for providing a time stamp for a presented file, particularly when the presented file is an email. Preferably a demanding party receives the email; generates a unique HASH; digitally signs the unique HASH; and sends the signed HASH and a time-stamp request call to a web services time-stamp conduit (WSTC). The WSTC receives the request and signed HASH from the demanding party and obtains a time stamp. The WSTC sends the time stamp back to the demanding party, which sends a time-stamp notification to the original sender of the email and, optionally, the recipient(s) of the email. Multiple branded or customized demanding servers can efficiently run using one web services time-stamp conduit.An integrated detailed billing system capable of pass-through client billing, keyword search functionality, a multi-party content management system, and convenient web-based automated verification (file or HASH) services are provided.