900,000 ISP customers blacklisted

Discussion in 'privacy general' started by ronjor, May 10, 2005.

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  1. ronjor

    ronjor Global Moderator

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  2. Paranoid2000

    Paranoid2000 Registered Member

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    Although the article does not mention this, the activity that is blocked for those addresses are attempts to connect via Simple Mail Transfer Protocol - i.e. only those running personal email servers or connecting to third party email servers using SPEWS would be affected.

    SPEWS has given the whole of Blueyonder a level 1 listing (SPEWS S3198 covering 850,000 IP addresses) when typically a level 2 is used to cover IP addresses not actually used for spamming. On the other hand, Senderbase report that 16808 addresses in BlueYonder's space have been sending emails, with many exceeding 10,000/day (magnitude 4).

    Given the spread of spam-sending zombies, ISPs really should be blocking port 25 by default while giving individual users the ability to set up exceptions where needed (e.g. a webpage where they could list the address of their company email server or any other systems they need to connect to via port 25).
     
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