Iíve got a domain thatís getting in excess of 1 million spam emails per day. None of the mail is going to any particular box. Itís all addressed to fake users so itís being redirected to /dev/null. My provider is barking (and should be) because a lot of server resources are being used with this spam being sent to /dev/null.
My question: Is there a way to divert the spam away before it hits my domain? Keep in mind there a several users who have live email boxes on this domain.
If you can get your host to turn on the RBL checks for your domain it would help, specifically the checks for Dynamic IP Ranges as that is where about 80% of the spam is coming from theses days.
I do this for a local ISP and we definitely are blocking a lot more incoming than we accept, this is for a range of about 1400 users. We had no choice in the blocking as his only other option was to build a more powerful server to handle the ever increasing load, he refused because as a dialup only ISP he is actually slowly losing more clients than he signs up as they convert to broadband, and yet his incoming mail traffic has more than doubled since last August.
I agree. Configure your MTA to use DNS-based blocking lists (a.k.a. DNSbls or RBLs) to reject the connections before the messages are sent over the wire. Good lists include ORDB, SBL (use the SBL-XBL combo list), and DSBL (there are many more).
Originally posted by webpros Just curious, why would someone make an offer on a domain that receives this much spam? What's the motivational factor?
They may believe the website to go with it will receive a lot of traffic if you're getting 1 million emails a day, or maybe they want a really good spam detector if most of the email is spam, could build a good list of IPs to block.
well, the mail still comes to the server. The MTA does the look up on the RBL/ORB/whatever, and depending on how you have it set up either reject it with a 5XX error or send to /dev/null...which all takes processing and bandwidth.
The solution we use and resell stop that mail from even touching our mail servers and not to mention saves the bandwidth of that potential spam and virus can cause
webpros problem is this domain is getting 1 million messages a day, and the server is being bogged down dealing with those messages. legit or not.