Hello. Our business recently switched IP addresses, and now we are getting the RBL block. Our IP range is not listed on any RBL, and our SPF records are correct.
Can anyone assist?
Below is the error and our IP address that's blocked. I have sent emails to that address with no acknowledgement nor change:
alph748.prodigy.netRemote Server returned '553 5.3.0 alph748 DNSBL:RBL 521< 22.214.171.124 >_is_blocked.For assistance forward this error to firstname.lastname@example.org'