One of the annoyances about .Mac email versus Gmail, AOL mail, or self-hosted mail (we use Spamassassin) is no server-side filtering. That means having to do manual deletions on the iPhone. Well, not until now - as of yesterday Apple offers junk mail filtering.
Edit: Just got an email from Apple:
Improved webmail spam filtering. .Mac Mail also helps you better manage unwanted email with enhanced junk mail identification and sorting in webmail. To activate this new feature, just turn it on in your webmail preferences—go to www.mac.com, click Mail, and select Preferences in the upper right.
