Hi
I have a couple of clients who host their own Exchange server (SBS 2008) and are experiencing a high number of non-deliveries and delay deliveries.
- They are on the Telecom network
- Fixed IP
- Exchange sending directly via DNS
- Most bounces/delays are to clear.net.nz or paradise.net.nz addresses (+ some other domains)
- Error messages suggest IP reputation as reason for rejection
- Delays seem to have occurred since Monday
- PTR record is default Telecom xxx-xxx-xxx-xxx.adsl.xtra.co.nz
- IP address does not appear to be blacklisted anywhere
- www.senderbase.org lists the IP reputation as poor (senderbase
I've asked Telecom to change the PTR record to the mail URL for one of my sites but unsure if this will fix things.
- Is anyone experiencing similar problems with their Exchange server on the Telecom network?
- Has something changed resently at TCL or elsewhere?
- Is there a temporary workaround (is it possible to use send.xtra.co.nz as a smarthost?)
- How do restore the IP reputation?
Thanks in advance.
Tim