@Sam I haven't done it yet. Actually, I would do it - I informed one of our business partners' IT guy about it for him to follow up with his ISP coz it's easier that way - saves me on the time needed to find a contact person at their ISP. I also believe [or is it assume?] that we have at least one techie from almost every ISP on the list so they would be aware.

So let me list the IP addresses of local ISPs that I've come across in my log files as blacklisted below:

http://www.robtex.com/ip/41.220.126.234.html <- AK
http://www.robtex.com/ip/41.215.65.34.html <- AK
http://www.robtex.com/ip/212.49.88.34.html <- Orange
http://www.robtex.com/ip/196.201.218.215.html <- Safcom
http://www.robtex.com/ip/212.49.92.74.html <- Jambonet/TKL/Orange

These are just a few. I'm not so sure about Postfix/Exim etc, but I can and have configured my mail server (MDaemon) to forward messages to the mx server of the recipient, rather than use relay servers. What I'm asking here is, why would someone use a relay server? Why not just forward the message straight to the recipient's mail server as per the recipient's domain's MX record on DNS?

Something else, apparently all blacklisted relay servers handling clean mail are local. If it's hard for relay servers not to get blacklisted, why am I only seeing local servers blacklisted?


Me.

On 30 April 2010 09:21, Odhiambo Washington <odhiambo@gmail.com> wrote:


2010/4/30 Alex Kamiru <nderitualex@gmail.com>
The ISP should help them setup their mail servers to ensure they adhere to certain standards in their server configurations. That is "service". As a matter of fact, they can also enforce the use of port 587 for mail submission, which will lock our most (if not all) spam emanating from compromised hosts on their LAN.

How would a company like Safaricom, Orange or Zain enforce this for all their broadband, 3G or EDGE clients who have no mail servers since they are 'home users' and only use outlook to send emails and they have no technical knowledge so to speak.

Dynamic hosts should never be allowed to "behave" as mail servers. I hope you understand what I mean. It's so simple. Any host without proper rDNS (hello name must match rDNS) should not be allowed to submit mail as a server (I mean in bulk).

--
Best regards,
Odhiambo WASHINGTON,
Nairobi,KE
+254733744121/+254722743223
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