Is there some magical undocumented way to export mail from Squirrel Mail? I'd like to move some of my friends (who are using my providers mail-hosting services) over to Gmail but I'm clueless as to how to go about doing it.
I've done it before, but it wasn't as magical as you may have hoped for. As Squirrel Mail uses IMAP, there is no tool that I can think of that allows to transfer the emails and the folder structure directly to Gmail. However, you can do it in two steps that way:
Part 1) Set up Outlook Express to use their IMAP server (see http://support.microsoft.com/kb/264580 for instructions on how to set it up properly). Then sync the folders, which will download all the emails.
Part 2) Use Google Apps Migration for Microsoft Outlook to upload the emails in your Gmail account.
Two parts tweak, but at least it works :)