[nznog] Network changes at Xtra ...

Hi, We're having a number of customers complain about email not being delivered over the Xtra network. Error messages being submitted to us are similar to: Apr 24 00:00:37 web1 postfix/smtp[14312]: 999977E99E: to=, orig_to=, relay=mta.xtra.co.nz[210.54.141.1], delay=7174, status=deferred (host mta.xtra.co.nz[210.54.141.1] said: 421 Message rejected (in reply to end of DATA command)) We know Xtra have recently being changing setting on firewall/router combination as we had a similar issue last week .... It looks like they are doing it again ! What really takes the biscuit is that customers who call Xtra are told that it's a fault of someone else i.e ours !! We're happy to take calls from these customers, but we would like to give them the right information, unlike Xtra is doing ! Could someone Xtra contact me off list, please. Sorry if this is off topic, but it's mighty frustrating as this is a continuous battle .. Thanks, Tim