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