Uhh... let's look at this. 1000 messages with 100KB PDF files. Now, binary attachements in email must be MIME encoded, which increases their size by about 50%, so you can assume 150KB of text x 1000 messages = 150 megabytes. That's a lot to process on a 486. Hell, data transfer time alone on a T1 would be like 10 minutes, not counting processing time and slower links. If you had even *ONE* client with a dialup or fairly saturated connection, then it would take more than 15 minutes to complete. Even so, Exchange's strength is not it's internet mail, but it's in it's client/server mail internal to networks. Further, why would you use Exchange 5.5 when Exchange 2000 is so much better?