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About TomBeckman

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  1. TomBeckman

    [Resolved] Impact of SpamCop blacklisting

    Thanks for all of the input. I had the talk with our email marketing company and presented all of the data that I collected about their mail servers. They're said that going to police spammers more effectively, and they know that I'm watching. I did ask about the impact of blacklisting. They said that a SpamHaus blacklisting has the biggest impact. Deliverability can drop from 95% to 35%. A SpamCop blacklisting can reduce deliverability from 95% to 75%. This morning I remembered another resource I used a while ago: http://www.senderscore.org which provides free mail server reputation statistics which give a good basic overview. They also have a more advanced paid service, but the free information give a lot of deliverability information. According to senderbase.org, some of the vendor's servers have a very good reputation, and are running campaign from very large organizations. Some servers have a very low reputation. Apparently those servers are for customers with "issues." By reading the comments here, collecting data from mxtoolbox.com blacklist monitors I set up, spamcop.net statistics, senderbase.org's list of the vendor's servers and senderscore.org's reputation scores, I had the information needed to get their attention. Thanks for everybody's input. Tom
  2. Our company uses a well-known email broadcast company. We are on a mail server shared by many customers which is frequently blacklisted by SpamCop due to spamming activity by some of these other customers. I track the blacklistings with mxtoobox.com We're talking to the email broadcast company about putting us on one of their servers with better-behaved customers, or giving us our own IP address, which they want to charge a lot for. I'd like to get input on the impact of a mail server being blacklisted by SpamCop. I know that SoamCop is a significant blacklist owned by IronPort/Cisco that's used by a lot of ISP's, security appliances, and antispyware programs that do spam filtering. Any ideas on the percentage on emails that get blocked when a SpamCop blacklisting is active? Thanks. Tom