Electrical computers and digital processing systems: multicomput – Computer conferencing – Demand based messaging
Reexamination Certificate
2005-10-25
2005-10-25
Vu, Viet D. (Department: 2154)
Electrical computers and digital processing systems: multicomput
Computer conferencing
Demand based messaging
C709S217000, C709S224000, C719S328000
Reexamination Certificate
active
06959324
ABSTRACT:
A dead e-mail identification locator discovers dead e-mail addresses without forwarding messages to valid recipients. Existing headers in the mail protocol are extended to include a test header. A mail server that supports the protocol extension of the present invention may send a reply if the address does not exist and may discard the message if the address does exist. The test header allows a sender to test an e-mail address for validity without the message being forwarded to the user, as will be described below. The sender may be a dead e-mail locator program, which tests a plurality of e-mail addresses. The sender and recipient mail servers may include attributes in the test header to enhance the analysis of delivery failures. Using these attributes, the dead e-mail address locator can pinpoint the location of e-mail message delivery failure and profile the performance of routing of messages and other details hidden from users.
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Kubik Joseph
Ullmann Lorin Evan
Glanzman Gerald H.
International Business Machines - Corporation
Mims Jr. David A.
Vu Viet D.
Yee Duke W.
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