But how many of those ISP's include calendars, contacts etc. That whole Exchange setup? I've never compared Zimbra to procmail's functionality, but I'm sure it had a large impact on Chandler. I still think the majority of users out there use a major web service provider. I still send mail using my own services on my servers, but I viewed inbound as not worth my time any more. Whether security or spam related, it just became too much of a burden to keep up with, along with everything else. The less servers/services I have to maintain the better. No documentation to keep up with. No having to train juniors to do it, much less hire them just for that. A number of universities have switched to gmail. smaller schools which never had 'personalized domain' email to being with now been able to come online with gmail. The vast majority of litigant/ticket related email addresses we process are web service based. Personally I'm also partial to being able to take your email/address with you, so I've always tried to avoid the ISP provided email address. Too bad Netcraft doesn't track email servers.