Hi,
when experimenting with rhsbl.ahbl.org sender blacklists on MTA level, I noticed: reject_warning: RCPT from mta121.cheetahmail.com[66.165.100.122]: 571 Service unavailable; Sender address [bo-byytbuda6faq70bcxwgsmb73r6zqxc@b.apc.chtah.com] blocked using rhsbl.ahbl.org; Domain used in spam. Access is not allowed.;
To me, the email seemed to be a valid product hotfix notification from http://www.apc.com to registered recipients.
What are your experiences with or views about cheetah.com? They appear to be mass mailers, but also engaged in anti-spam measures / sender verification acitivities, and what are your experiences with rhsbl.ahbl.org?
I would like to make up my mind - whether to whitelist cheetah.com mailservers from being blocked on MTA level in order to avoid FPs when using ahbl - whether to use rhsbl.ahbl.org to reject mails at the MTA level.
Cheers,
wolfgang