We received many or reports from clients unable to receive email from senders, with our servers reporting that the sending servers are blacklist as spam sources. Turns out it was a false alarm that has since been resolved.

Digital Defense announced today that they had uncovered a vulnerability affecting the cPanel and WebHost Manager (WHM) software. Until recently, the software exhibited a flaw that would allow bypassing of two-factor authentication (2FA). This would make the software vulnerable to brute force attacks.