Like Sendio, Postini, etc?
Message Labs?
What is good?
Sendio sucks
You looking an appliance or you going to run the software on a server?
canit has worked great for us, run it on a barebones linux server - cheap and effective.
edit: unless you’re looking for hosted services (which is kinda nice actually if you have crap comm service, they can queue your mail for you during an outtage)
we just switched to a program/setup called tubleweed and seems ok so far. I don’t run it or anything so not sure how easy it is to admin, but great on the user end of things
Message labs sucks. Personally I have always prefered a hosted service rather than a appliance i have to worry about from all of the ones i have tryed and seen MXLogic is by far and large the best of them for hosted services.
I agree. I forgot who does ours. I think its like SpamRiver or something like that. Works great.
probably AppRiver, they are ok but they have a lot of downtime, one of our satelite offices uses them b/c they are too small for an appliance.
I have to be honest, we were leary of moving away from a service to an appliance but I couldn’t be happier. Full admin control, custom rules, with canit you can even set it up with each user managing their own stream. That feature alone is worth not having a service… no more “oh wtf i didn’t get this email check the spam filter for me”.
100% vouch for canit on a stripped linux box… cheap, effective, awesome uptime, great customer support.
You might want to take a look at the Barracuda appliance. They do their own lists, R&D and write their own SPAM filter engine so costs are low for licensing/maintenance agreements. I have personally never installed one but I could get you in touch with someone who has. We use one for our corporate email and it works great.
I use Frontbridge. Works flawlessly. Highly recommended.
http://www.appriver.com/ is ours. works pretty good.
You mean microsoft 
They where bought out and now go by “microsoft hosted exchange services” still quite good though from what i have seen and heard.
M$ buys everyone, and yes it is quite good. I think out of all of my users maybe 3 or 4 messages get through per year. When we need to add those messages to the block list, they have an AWESOME web admin interface so you don’t even have to contact them to block something. I can just do it myself.
Added bonus: If my Exchange server goes down for some reason, they store all of our mail until it comes back online again. :tup: