we have a domain name hosted by 1and1. we have an mx record that points to our exchange mail server public ip address.
we have just replaced our internet service provider and have been issued with a new public up address. all of our dns records have been updated to reflect the ip change.
all seems to work ok, but we are getting a few messages bouncing back to us.
on checking further using mx toolbox we are advised that we do not have a reverse lookup ptr registered.
on contacting 1and1 they tell me that they cannot add a ptr record to our dns.
am i right in thinking this could be the cause of our problem, and if so, how would we resolve it if 1and1 can’t provide what i consider to be a basic requirement.
one other thought was that recipients would have to update their white lists as mail currently being issued has a different ip associated with our domain name.
any advice / suggestions would be much appreciated.