Why ISP's don't use IMAP

So that is why asu sucks. imap2.asu.edu...

Eric Lee Green wrote:

>>or use fetchmail to pull my mail from my POP (why cant ISP's use
>>IMAP?!?) mail account.
>
>
> Because the only imap server that'll serve old-fashioned single-file mail
> folders is wu-imapd, which is a) buggy as hell, b), slow as hell, and c)
> slows things to a crawl on the server it's running on. The other imap servers
> out there require Maildir-format mail folders, which chew up your inodes like
> crazy and thus aren't suitable for an ISP's mail server.
>
> Since I run my own mail server and only have five or six people using it, I
> can run imap on it. But it does get very slow when dealing with messages with
> large attachments, or with very large folders.
>