Incoming mail size limit?

Is there any limit on the size of incoming mails for fully hosted mail users? In the last few weeks, a couple people have sent me email with attachments around 15MB or so and I have never received these emails and the senders don’t get any kind of failure notice from their provider.

I’m not using webmail, I’m using IMAP and there’s no quota limit issues, so I was just curious if the DH mail servers have some sort of limitation on incoming mail.

Wiki says 40 megs.

Well, that’s obviously not my problem then :). Thanks.