Sending unauthenticated email through the mailserver from remote subnet. (Send connector issue?)
Posted on 2015-01-13
I have an APC UPS with a management card. Within the interface I can set my server IP, smtp port, sender, recipient for sending notifications (power outages, temperature etc).
I use this on my main site without issue, emails bounce off the exchange box and come in from APC_Server1@attwater.com completely unauthenticated.
The problem occurs when I replicate this setup on a remote network segment (connected through VPN). It fails/times out, with very little detail in the available log.
Initially I though it was a firewall issue (I have seen them have issues with remote subnets). I discounted this by turning off the firewall.
So it must be an exchange issue, presumably with permissions on the send connector. I have added the ip range of the remote segment to the Default Receive Connector, but still no joy.
I am running SBS 2008 with exchange 2007.
Any ideas how to test / debug?