Some of my users are getting NDRs since we changed ISP and got a new static IP.
#554 Service unavailable; Client host [220.127.116.11X] blocked using dul.dnsbl.sorbs.net; Dynamic IP Addresses See: http://www.sorbs.net/lookup.shtml?18.104.22.168X
I submitted a ticket to SORBS to have the IP address removed from the database list, but got this:
"I've analyzed the following IP space, based on the text of your request:
Not all the IP space you requested can be delisted at this time."
HELP?!? Next step(s)?