I often send emails from my ihug account to various addresses at the Telecom domain (...@telecom.co.nz). However at approx. 11:30 this morning, something odd started happening. Every email I now send to @telecom.co.nz addresses comes back with the following error from the ihug SMTP server:
<...@telecom.co.nz>: host ish5.telecom.co.nz[146.171.13.194] said:
554
Service unavailable; Client host [203.109.132.1] blocked using
dnsbl.sorbs.net; Dynamic IP Addresses See:
http://www.sorbs.net/lookup.shtml?203.109.132.1 (in reply to RCPT TO
command)
A reverse DNS lookup on that IP address yields "smtp1.ihug.co.nz"
Am I right in thinking this indicates that Telecom is filtering incoming emails via SORBS, and somehow ihug's SMTP server is now in the SORBS blacklist? Who needs to know about this?