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公开(公告)号：US07490128B1
公开(公告)日：2009-02-10
申请号：US10761883
申请日：2004-01-20
IPC分类号： G06F15/16
CPC分类号： H04L51/12
摘要： The spam blocker monitors the SMTP/TCP/IP conversation between a sending message transfer agent MTA—0 and a receiving message transfer agent MTA—1; catches MTA—0's IP address IP—0, MTA—0's declared domain D—0, sender_address A—0; and recipient A—1; and uses this source and content based information to test for unsolicited messages. It interrupts the conversation when MTA—0 sends a command specifying the recipient (an “RCPT” command) and uses the various test results to decide if the message is suspected of being unsolicited. If the message is suspected of being unsolicited then it logs the rejected message, sends an error reply to MTA—0 which forces MTA—0 to terminate the connection with MTA—1 before the body of the message is transmitted; else it logs the allowed message, releases the intercepted RCPT command which allows the conversation between MTA—0 and MTA—1 to proceed.
摘要翻译： 垃圾邮件拦截器监视发送消息传送代理MTA-0和接收消息传送代理MTA-1之间的SMTP / TCP / IP对话; 捕获MTA-0的IP地址IP-0，MTA-0的声明域D-0，sender_address A-0; 和接受者A-1; 并使用此源和基于内容的信息来测试未经请求的消息。 当MTA-0发送指定收件人的命令（“RCPT”命令）时，它会中断会话，并使用各种测试结果来确定该邮件是否被怀疑是未经请求。 如果该消息被怀疑是未经请求的，则记录被拒绝的消息，向MTA-0发送错误答复，MTA-0在发送消息正文之前迫使MTA-0终止与MTA-1的连接; 否则它记录允许的消息，释放拦截的RCPT命令，允许MTA-0和MTA-1之间的对话继续进行。
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公开(公告)号：US08788596B1
公开(公告)日：2014-07-22
申请号：US12317938
申请日：2008-12-30
IPC分类号： G06F15/16
CPC分类号： H04L51/12
摘要： The spam blocker monitors the SMTP/TCP/IP conversation between a sending message transfer agent MTA—0 and a receiving message transfer agent MTA—1; catches MTA—0's IP address IP—0, MTA—0's declared domain D—0, from-address A—0; and to-address A—1; and uses this source and content based information to test for unsolicited messages. It interrupts the conversation when MTA—0 sends a command_specifying the recipient (an “RCPT” command) and uses the various test results to decide if the message is suspected of being unsolicited. If the message is suspected of being unsolicited then it logs the rejected message, sends an error reply to MTA—0 which forces MTA—0 to terminate the connection with MTA—1 before the body of the message is transmitted; else it logs the allowed message, releases the intercepted RCPT command which allows the conversation between MTA—0 and MTA—1 to proceed.
摘要翻译： 垃圾邮件拦截器监视发送消息传送代理MTA-0和接收消息传送代理MTA-1之间的SMTP / TCP / IP对话; 从地址A-0捕获MTA-0的IP地址IP-0，MTA-0的声明域D-0; 和地址A-1; 并使用此源和基于内容的信息来测试未经请求的消息。 当MTA-0发送命令指定收件人（“RCPT”命令）时，会中断会话，并使用各种测试结果来确定该邮件是否被怀疑是主动请求。 如果该消息被怀疑是未经请求的，则记录被拒绝的消息，向MTA-0发送错误回复，迫使MTA-0终止与MTA-1的连接，然后发送消息正文; 否则它记录允许的消息，释放拦截的RCPT命令，允许MTA-0和MTA-1之间的对话继续进行。
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公开(公告)号：US07673058B1
公开(公告)日：2010-03-02
申请号：US10761894
申请日：2004-01-20
IPC分类号： G06F15/16 , G06F15/173
摘要： The spam blocker monitors the SMTP/TCP/IP conversation between a sending message transfer agent MTA—0 and a receiving message transfer agent MTA—1; catches MTA—0's IP address IP—0, MTA—0's declared domain D—0, from-address A—0; to-address A—1, and the body of the message; and uses this source and content information to test for unsolicited messages. It interrupts the conversation when MTA—0 sends a .\r\n end-of-message indicator and uses the various test results to decide if the message is suspected of being unsolicited. If the message is suspected of being unsolicited then it logs the rejected message and sends an error reply to MTA—0 which forces MTA—0 to send a QUIT command before the body of the message is transmitted; else it logs the allowed message and releases the intercepted RCPT command which allows the conversation between MTA—0 and MTA—1 to proceed.
摘要翻译： 垃圾邮件拦截器监视发送消息传送代理MTA-0和接收消息传送代理MTA-1之间的SMTP / TCP / IP对话; 从地址A-0捕获MTA-0的IP地址IP-0，MTA-0的声明域D-0; 到地址A-1和消息的正文; 并使用此源和内容信息来测试未经请求的消息。 当MTA-0发送。\ r \ n消息结束指示符时，它会中断对话，并使用各种测试结果来确定该消息是否被怀疑是主动请求。 如果该消息被怀疑是非请求的，则它记录被拒绝的消息，并向MTA-0发送错误答复，这迫使MTA-0在发送消息的主体之前发送QUIT命令; 否则它记录允许的消息并释放拦截的RCPT命令，允许MTA-0和MTA-1之间的对话继续进行。
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公开(公告)号：US07716351B1
公开(公告)日：2010-05-11
申请号：US10761864
申请日：2004-01-20
IPC分类号： G06F15/16 , G06F15/173
CPC分类号： H04L51/12
摘要： The spam blocker monitors the SMTP/TCP/IP conversation between a sending message transfer agent MTA—0 and a receiving message transfer agent MTA—1; catches MTA—0's IP address IP—0, MTA—0's declared domain D—0, from-address A—0; and to-address A—1; and uses this source and content based information to test for unsolicited messages. It interrupts the conversation when MTA—0 sends a RCPT command and uses the various test results to decide if the message is suspected of being unsolicited.If the message is suspected of being unsolicited and to-address is not in the save_spam database then the spam blocker logs the rejected message, sends an error reply to MTA—0 which forces MTA—0 to terminate the connection before the body of the message is transmitted. If the message is suspected of being unsolicited and to-address is in the save_spam database then the spam blocker logs the rejected message, substitutes a diversion address A′—1 for the to-address A—1 in the RCPT command, and send the modified RCPT command to MTA—1 and allows the conversation to continue. If the message is not suspected of being unsolicited then the spam blocker logs the allowed message, releases the intercepted RCPT command which allows the conversation to continue.
摘要翻译： 垃圾邮件拦截器监视发送消息传送代理MTA-0和接收消息传送代理MTA-1之间的SMTP / TCP / IP对话; 从地址A-0捕获MTA-0的IP地址IP-0，MTA-0的声明域D-0; 和地址A-1; 并使用此源和基于内容的信息来测试未经请求的消息。 当MTA-0发送RCPT命令时，它会中断会话，并使用各种测试结果来确定该消息是否被怀疑是非请求的。 如果该消息被怀疑是未经请求，并且地址不在save_spam数据库中，那么垃圾邮件拦截器将记录被拒绝的消息，向MTA-0发送错误回复，这迫使MTA-0在消息正文之前终止连接 被传送。 如果该消息被怀疑是未经请求，并且save_spam数据库中的地址位于垃圾邮件拦截器中，那么垃圾邮件拦截器将记录被拒绝的消息，将转移地址A'-1替换为RCPT命令中的地址A-1，并发送 修改RCPT命令到MTA-1并允许对话继续。 如果该消息不被怀疑是非请求的，那么垃圾邮件阻止程序会记录允许的消息，释放拦截的RCPT命令，允许对话继续。
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公开(公告)号：US08423618B1
公开(公告)日：2013-04-16
申请号：US12716241
申请日：2010-03-02
IPC分类号： G06F15/16
CPC分类号： H04L12/6418
摘要： The spam blocker monitors the SMTP/TCP/IP conversation between a sending message transfer agent MTA—0 and a receiving message transfer agent MTA—1; catches MTA—0's IP address IP—0, MTA—0's declared domain D—0, from-address A—0; to-address A—1, and the body of the message; and uses this source and content information to test for unsolicited messages. It alters the conversation to reject, divert or intercept the message if the message is suspected of being unsolicited.
摘要翻译： 垃圾邮件拦截器监视发送消息传送代理MTA-0和接收消息传送代理MTA-1之间的SMTP / TCP / IP对话; 从地址A-0捕获MTA-0的IP地址IP-0，MTA-0的声明域D-0; 到地址A-1和消息的正文; 并使用此源和内容信息来测试未经请求的消息。 如果该信息被怀疑是未经请求，它会改变对话来拒绝，转移或拦截该消息。
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公开(公告)号：US07310660B1
公开(公告)日：2007-12-18
申请号：US10700752
申请日：2003-11-03
CPC分类号： H04L63/1408 , H04L51/12 , H04L63/126
摘要： A set of unsolicited e-mail messages is collected and “finger printed” by either sampling the unsolicited message and using portions of the samples to form the identifier or by hashing a portion of the message. These “finger prints” are used to construct an unsolicited message database. The client's e-mail messages are processed in off-line manner by periodically fetching their messages; “finger printing” each message in a manner identical to the unsolicited messages; checking to see if the “finger print” is in the unsolicited message database; discarding any messages with a “finger print” in the unsolicited message database; and forwarding any message with a “finger print” not in the unsolicited message database to the “clean” POP server. The client's e-mail messages can also be processed in a on-demand manner by intercepting their “clean” POP server request; fetching their mail from their “dirty” POP; “finger printing” each message in an manner identical to the unsolicited messages; checking to see if the “finger print” is in the unsolicited message database; forwarding any message with a “finger print” not in the unsolicited e-mail database to the “clean” POP server; and passing the intercepted POP request to the “clean” POP.
摘要翻译： 通过对未经请求的消息进行采样并使用部分样本来形成标识符或通过散列消息的一部分来收集和指定一组未经请求的电子邮件消息。 这些“指纹”用于构建非请求消息数据库。 客户端的电子邮件通过定期取出其消息以离线方式处理; 每个消息以与主动消息相同的方式“手指打印”; 检查“手指打印”是否在未经请求的消息数据库中; 在未经请求的消息数据库中丢弃具有“指纹”的消息; 并将不在未经请求的消息数据库中的“指纹”的任何消息转发到“干净”POP服务器。 客户端的电子邮件消息也可以通过拦截其“干净”的POP服务器请求按需处理; 从他们的“肮脏”POP中取出邮件; 每个消息以与主动消息相同的方式“手指打印”; 检查“手指打印”是否在未经请求的消息数据库中; 将未指定电子邮件数据库中的“指纹”的任何消息转发到“干净”POP服务器; 并将拦截的POP请求传递给“干净”POP。
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