amavisd-new is a high-performance and reliable interface between MTAs and one or more content checkers, including virus scanners, and/or the Mail::SpamAssassin Perl module. It talks to an MTA via (E)SMTP or LMTP, or by using helper programs. No timing gaps exist in the design, which could cause a mail loss. It is normally positioned at or near a central mailer, not necessarily where the user's mailboxes and final delivery takes place. License: GNU General Public License (GPL) Changes: DKIM signing and verification is now natively supported. Policy banks based on DKIM-validated author address offer whitelisting and bypassing of banning checks. Backscatter bounces can be killed based on pen pals lookups. The SQL database was made partitionable. SA logging is merged with native logging, along with a SA 3.3 timing report. Messages from a quarantine can be released as attachments. Basic support for abuse reporting was added. TLS is supported. Amavisd-nanny and amavisd-agent re-open a database on amavisd restarts. p0f-analyzer.pl was updated to support source port number in queries.

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