Comment by nailer

I worked on IBM GS's dedicated Linux team. Notes didn't have a native client, so someone made a secret IBM internal tool call `fetchnotes` - a small binary that converted Lotus X400 email into POP3 or IMAP4 (not sure which), calendar appointments into icals, and contcts into vcard.

It got so popular - you could do your work using Thunderbird instead of Notes - that Windows users wanted to run Linux VMs to run Fetchnotes and not have to use Notes.