2010/4/30 Alex Kamiru <nderitualex@gmail.com>
For an ISP who offers email relay services, its a tricky business avoiding blacklisting. This is because you have all types of users behind your network using your servers and a good number of them could have their machine infected with trojans that send out spam. Options are available such as using port 587 for mail submission instead of 25 but the support involved with that would be a nightmare or having relay servers as anti-spam gateways but also this comes at the risk of false positives.
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.
I also have a problem with companies with internal servers using smart relay to ISP relay server. Someone needs to educate me why this is necessary step if all other necessary measures like rDNS and security have been taken care of.
In this age where bandwidth is available, there is no need for them to use smart hosts. -- Best regards, Odhiambo WASHINGTON, Nairobi,KE +254733744121/+254722743223 _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ "If you have nothing good to say about someone, just shut up!." -- Lucky Dube