Scam-backscatter

Description

Scam-backscatter prevents backscatter (accept and bounce) on mail servers which dont host mailboxes locally. The project validates mailboxes by verifying the recipient addresses hosted on a different mail server. Backscatter is when a mail server accepts an email with a forged sender address, then generates a bounce (non-delivery receipt) to the sending address. The figure below shows an example where the sender address is forged: 1. An email is sent by smtp.example.com with a forged sender address of user1@example.org to user2@example.net. 2. The email is accepted for delivery by smtp.example.net. 3. The email is then forwarded to mailbox.example.net. As there is no user2 mailbox on mailbox.example.net, a bounce message (non-delivery receipt) is generated by mailbox.example.net to notify the sender address (user1@example.org) of the delivery failure. 4. The bounce message is sent to the mail server at smtp.example.org. 5. user1@example.org receives the bounce message. Your mail server can prevent backscatter by validating the recipient email address in step 2.. Eland Systems Scam-grey antispam milter

Sender Address - Mail Servers - Mail Server - Mail - Bounce - Backscatter - Address - Mailboxes - Email - Scambackscatter - Communications

Published By:Eland Systems

License Type:Freeware

Date Added:22 October, 2010

Version:1.2.2

Price:Free

Downloads:29

Size:16.4 KB

Platform: Linux

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