Getting false positive DNS errors when sending to ATT/SBC? Aug 062021 att deliverability tip false positives Are you running into this error message when sending to users at AT&T/SBCGlobal email domains ? <(user)@sbcglobal.net>: host al-ip4-mx-vip2.prodigy.net [144.160.235.144] said: 550 5.… Read more
