| 摘要 |
This invention relates to methods and apparatus for storing short message service (SMS) and e-mail messages for detecting sources of spam messages and especially spam messages for fraud or pornographic purposes. Since storage of critical messages may be required for longer intervals and since the amount of spam message traffic is large, it is impractical to store all suspected spam messages for the maximum interval required for anti-fraud purposes. Accordingly, under the control of an anti-spam bureau, different classes of actual spam, suspected spam, and non-spam messages are stored in different subfiles; each subfile can have a different retention period and percentage of suspected spam messages to be stored; the amount of storage for ones of the subfiles and the retention period can also be modified under the control of the anti-spam bureau. Advantageously, a limited amount of anti-spam storage can be used in an optimum fashion to retain that mix of messages which the anti-spam bureau considers to be optimum. |
