Took two days to finally get an account. Still blacklisted
What what the source of the problem and the fix?
That info is required for delisting.
Still not sure why they got blacklisted. Timewarner told me to adjust the TTL to 12 hours.
Yes, having matching custom forward and reverse DNS TTL's that are at least 14400 seconds is one of the requirements for getting delisted at SORBS.
Not knowing what caused you to get listed is a problem.
If you get delisted and the problem repeats you'll get hit for being a repeat offender.
Likely causes of listings are spam and/or backscatter going to SORBS spamtrap accounts.
Make sure that the mail servers are only accepting email for addresses that can be delivered to, and that they 5xx reject emails that won't be delivered before they are accepted.
Also check to make sure none of the computers the mail server will relay mail for are infected and sending spam.
Do you see any unusual activity in your mail logs?