This version is technically speaking a beta version,
but is stable enough to so that it can be used in a production environment.

To download the latest 32bit beta update click here
To download the latest 64bit beta update click here

If you want a notification when the next beta is released then click here
 

Changes since the last full release

v3.47i 2012-04-13

• New: Prevent test for On-Access scanner at startup (VirusScannerOnAccessStartupCheck=False)
• Chg: VerboseSLS shows more information
• Chg: IPv6 DNS query using ALL and fall back to A/AAAA for server that don't support it
• Chg: Examine the IP addresses in the message header ignored the Backup MX
• Fix: Unnecessary restart when timezone changes
• Fix: Very large attachment filled with ASCII zeros takes a long time to decode

v3.47h 2012-02-29

• Fix: Remove subject tag for outbound messages for html format with a script
• Fix: Cache of domain based SLS/RBL
• Chg: Heuristic value for tags in a html page

v3.47g 2012-02-16

• Fix: Heuristic failed to proper scan HTML source
• New: Support status query using Nagios
• Chg: Senderbase and Country skip the backup MX

v3.47f 2012-01-30

• Fix: SMIME certificates with an e-mail only in subjectAltName
• Fix: On-Access virus scanning with file extensions enabled resulted in a false positive when the extension was very long with non-ASCII characters
• Chg: SMTP EHLO/HELO is equal to RSET
• Chg: Removed announcement for NTLM AUTH for SMTP clients
• Chg: No longer checking a Backup MX for SLS/RBL and other methods during the SMTP session

v3.47e 2011-12-05

• New: The Format column in the statistic file indicates a IPv6 connection
• New: Enhanced TLS peer certificate verification (OutboundSMTPTLSVerify=True)
• New: Support for Online Certificate Status Protocol (OCSP)
• New: Compiled with ASLR (address space randomization) and NX (no execution)
• Chg: OpenSSL updated to v1.0.0e
• Fix: Binding to a IPv6 address erroneously enabled inbound IPv6
• Fix: MBAdmin crashed in Options->Global Exclude
• Fix: Message with a FromStaticRoute needs an exemption from connection cache
• Fix: Message-id was not unique when created within one tick

v3.47d 2011-10-18

• New: Connection cache to Exchange (OutboundExchConnectionCache=True)
• New: Global exclusion for TLS required sender (InboundExclTLSRequired=True)
• New: Verify a certificate using the CommonName and the subjectAltName
• Chg: Auto IP blocking double checks for the IP of a backup MX
• Fix: Checking for an exploit in a zip file
• Fix: Omit recipient check for an echo address
• Fix: Reject internal From: address during the SMTP session was not working
• Fix: Inbound connection manager stopped when out of resources

v3.47b 2011-09-03

• New: Zip archive with an unsupported compression method is handled
  like a password protected zip archive
• Fix: Connection manager shut down when system goes out of resources
• Fix: Faster accepting inbound connections
• Fix: E-Mail query against Exchange in ISP Edition

v3.47a 2011-07-14

• New: Detection of phishing messages (Options->Spam->Phishing)
• New: Heuristic scans for word with upper chars like ThereAreHugeDiscountOnTheseDrugs
• Fix: Optionally don't enforce a FQDN after EHLO command