A few years back I was working with a BigButNimbleCo (yes, they exist) and there was a sudden kerfuffle. It seems that the Exchange servers had started crashing because there was too much email in them, and IT was sending out warnings that stuff was going to be deleted, so save what you wanted into archive files on the file shares.
Sorry, I may not have explained this very clearly: Exchange was crashing because it held too much mail. I have no idea how many terrabytes were involved, but there fewer than 10,000 employees at the time.
I know everyone is going to say that Exchange and Hotmail are completely different code bases, but what they have in common is Microsoft's vision of what people do with email and how they do it. I'd say that deleting old mail is in Microsoft's DNA.
I've kept email since I switched from Hotmail to POP3 in about 1998. The wonderful bit is I wrote a desktop application which scans any number of hard drives and finds all mail in the main 5 formats (Mbox, Kmail files, Outlook <2003, Outlook 2003, Outlook Express, Eudora). Then you can search it with SQL.
I haven't been able to find a customer for it but I love using it.
But the point is "Don't throw away all that old email, put it in a database so you can search over 100,000 messages for just a few results to look at".
Sorry, I may not have explained this very clearly: Exchange was crashing because it held too much mail. I have no idea how many terrabytes were involved, but there fewer than 10,000 employees at the time.
I know everyone is going to say that Exchange and Hotmail are completely different code bases, but what they have in common is Microsoft's vision of what people do with email and how they do it. I'd say that deleting old mail is in Microsoft's DNA.