Dear all,
one a month we have the IP listed on the spamhaus we have been looking for the error and the cause but cannot seem to find any.
we've used mail-tester and the only issue we can find is the next (This may indicate you do not have a rDNS configured for your hostname or the rDNS does not match your sending IP ) which is scored -1.274.
PTR records is correct and we can find the right info in the mxtoolbox.com
i have used the dig websiteand everything is right configured.
can someone please advies where to look and what to do ?
Mail Scanner score we have is 8.9/10 but we cannot find the cause.
our network ports are limited so no other device can send out only the exchange server.
Thank you for your support