My top rejections for today are:
% fgrep www.barracudanetworks.com/reputation /var/log/mail.log |
awk '{print $10}' | sort |uniq -c | sort -n | tail
18 mx35.ispgateway.de[80.67.29.41]:
. . .
21 mx20.ispgateway.de[80.67.18.53]:
21 mx43.ispgateway.de[80.67.29.52]:
. . .
24 mx31.ispgateway.de[80.67.29.35]:
We see those too. Hosts in this domain are sending mail FROM:<>
to recipients that do not exist, subject "Mail delivery failed:
returning message to sender".
It's ironic for Barracuda to blacklist hosts for backscatter.
Joseph Brennan
Columbia University Information Technology
