Well, the host fixed it. Not sure what he did, but said he "removed my local IP from their blacklist?" I thought it might have been the other way around, but at least its back up and working. Thanks to everyone too for the input.
Glad it's working again.
I would ask the Host provider why your address was blacklisted.
Sometimes it just happens, sometimes there's something you or something on your machine is doing that flags the IP address (repeatedly pinging it, uploading many,many,many files in one period time frame - things that aren't normal usage). They can tell you ... if you ask.
Unfortunately getting your IP on a blacklist is very common and a (usually) Small business will find that although they just started literally today cannot send a Email to clients or potential clients without it getting blocked somewhere down the long and winding road to their inbox in a lot of cases it will not even make it to the Junk folder.
You said that your ISP removed it from their blacklist, Unfortunately that is just the beginning of you getting your IP off of the hundreds of blacklists out there. It is a very daunting task for most people.
Many companies hire someone to take care of their IP and make sure it is not blacklisted before they go online.
It takes a lot of time and effort (month's) to get off all of the blacklist's, Most people hire someone to do that for them.
You may want to beg/borrow/steal a new IP from your ISP to skip the hassle.
If your ISP's subnet is on the blacklist your pretty much out of luck you will have to move.
I have a few links that check for malicious/blacklisted IP's
http://www.isithacked.com/
http://www.brightcloud.com/tools/url-ip-lookup.php
I don't agree that blacklisting an IP is common. It has only happened to me (or my clients) once in over 30 years (yes, there was an Internet before WWW).
It is common to be blacklisted across the board though. Companies, such as BrightCloud provide service to many companies. Their, or similar service, blacklist gets propagated everywhere. If your IP is in the list, you can ask your provider contact their provider to remove your IP. It takes a few cycles to get the updated blacklist out, but it isn't difficult nor should it require hiring someone to clean up the blacklist.
Thanks for the links that check if an IP is on the list.
Bill
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Some say it takes 24 hrs to get removed, or so they say.
http://www.spamhaus.org
http://www.abuseat.org/lookup.cgi
http://www.mxtoolbox.com/blacklists.aspx
http://www.lashback.com/blacklist
http://mailspike.org/usage.html
I've seen it take two weeks or more to clear the field
Not every company applies updates immediately and some only do so on a scheduled manitenance basis, so it takes a while
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