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| Communication method, communication system and communication apparatus |
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| Communication device having interchangeable faceplates and active keypad cover |
| OF A PREFERRED EMBODIMENT Referring now to FIG. 1, it shows a front elevational view of a ... |
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| Anti-theft and identification devices for concealing in articles |
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| Contactless smartcard for use in cellular telephone |
| OF THE DRAWINGS Referring to FIG. 1, a pictorial diagram is shown illustrating the conceptual idea ... |
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| Automated proximity notification |
| In accordance with this invention, users of presently contemplated services employ state of art ... |
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Method for restricting delivery of unsolicited E-mail
| Details |
Inventors: Drummond, Kirk; Fields, Duane Kimbell; Gregg, Thomas Preston; Kolb, Mark Andrew;
Assignee: International Business Machines Corporation (Armonk, NY)
Primary Examiner: Maung; Zarni
Assistant Examiner:
Attorney, Agent or Firm: Yee; Duke W., LaBaw; Jeffrey S., Bailey; Wayne P.
A method and computer program operative in an e-mail server for reducing unsolicited e-mail in an enterprise computing environment. According to the invention, e-mail is accepted for delivery to e-mail clients only if it is from an address that has been verified by an e-mail server and/or approved by a recipient. When an e-mail from a particular address is received at the e-mail server for the first time, the server automatically issues an e-mail to the address to request that the sender verify the authenticity of the original message. If a return acknowledgement is received within a given time period, the e-mail is deemed to be authentic and delivered to its intended recipient within the enterprise. Mail messages from previously-verified addresses need not be rechecked. |
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DETAILED DESCRIPTION The present invention is a method and computer program operative in an e-mail server for reducing unsolicited e-mail in an enterprise computing environment.
According to the invention, e-mail is accepted for delivery to e-mail clients only if it is from an address that has been verified by an e-mail server and/or approved by a recipient.
When an e-mail from a particular address is received at the e-mail server for the first time, the server automatically issues an e-mail to the address to request that the sender verify the authenticity of the original message.
If a return acknowledgement is received within a given time period, the e-mail is deemed to be acceptable and delivered to its intended recipient within the enterprise.
Mail messages from previously-verified addresses need not be rechecked.
According to a preferred embodiment, a list of approved addresses is maintained at the e-mail server for each user, preferably without requiring the user's interaction.
The address of any outbound e-mail sent from an e-mail client is automatically added to the user's approved address list.
An inbound e-mail having a sending address that is seen for the first time is delivered to a holding queue instead of being delivered to the intended recipient.
The server responds to the inbound e-mail by issuing an e-mail back to the unknown sending address, requesting a return acknowledgement.
If the acknowledgement is received within a given time period, the e-mail is released from the holding queue and delivered to the intended recipient.
If, however, an acknowledgement is not received within the given time period, it is flushed from the holding queue.
Using this method, spam e-mail accumulates in the user's holding queue instead of being delivered to the user's inbox because spamming is typically accomplished by automated routines that cannot or do not respond to the e-mail's server's request for acknowledgement.
In a representative embodiment, a method of restricting unsolicited e-mail is responsive to receipt of an e-mail for determining whether a sending address associated with the e-mail is on a given list of approved addresses
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