--On Friday, September 22, 2006 8:38 +0800 Mark van Proctor <[EMAIL PROTECTED]> wrote:
Just wondering what the consensus is in regards to mail servers that do not have reverse DNS configured. Is it common for business mail servers to be unconfigured in this way? I have been watching my logs for a few days and all emails from mail servers that connect with an IP address that does not reverse DNS map have been spam.
It is not common, but there are enough of them to prevent us just rejecting for this reason. There are two usual cases. One is a small business or nonprofit with one system admin trying to do everything and not being aware of the DNS record; those get fixed when you tell them. The other case has to do with a third party hosting company or with some kind of firewall, and in those cases the sys admin sometimes claims that fixing it is beyond his power. But then sometimes they fix it. We score for it, so sometimes other factors push the score to where we reject. That's why I've had some correspondence with various people. It has never been a large company with a real IT department. It's always some small-scale operation. Joseph Brennan Columbia University Information Technology _______________________________________________ NOTE: If there is a disclaimer or other legal boilerplate in the above message, it is NULL AND VOID. You may ignore it. Visit http://www.mimedefang.org and http://www.roaringpenguin.com MIMEDefang mailing list [email protected] http://lists.roaringpenguin.com/mailman/listinfo/mimedefang
