Occasionally I've heard from some gov. agency that their systems were blocking email from me because of bad reputation. I was able to get it cleared up, but it did have me look into what yougetsignal.com's Reverse IP Domain Check. At that time it did find several UNhappy domains on same server as mine, including:
Happily those guys are no longer in existence.
Now (today) all of a sudden I hear from postfix that a university mail system rejects my email "because of reputation":
The Postfix program
barracuda2.colostate-pueblo.edu[18.104.22.168] said: 554 Service
unavailable; Client host [sd-green-bigip-66.dreamhost.com] blocked using
http://bbl.barracudacentral.com/q.cgi?ip=22.214.171.124 (in reply to RCPT TO
Yes, I have emailed DH support, but I'd love to hear others' experiences with how actively DH tries to clean out customers doing spam/porn/scams/etc so that my shared-host sites are not penalized by bots, email systems, etc.
Thanks for relating any experiences.