A new pre-release of SpamFilter (v4.0.1.782) is available in the registered user area. The changes since the latest official release (4.0.0.772) are as follows:

// New to VersionNumber = '4.0.1.782';
{TODO -cNew : There was a limit of 65535 emails that could be queued in the quarantine and the queue directories in case the DB or the dest. SMTP servers were offline. Stopped using the Windows API to create temp files and are now using GUIDs to eliminate this limitation}

// New to VersionNumber = '4.0.1.780';
{TODO -cNew : Added the ability to specify additional failover destination SMTP servers for each domain}

// New to VersionNumber = '4.0.0.775';
{TODO -cFix : Eliminated the extra "--" when logging the event "Bypassed all rules for: user@domain.com --" in the activity log}
{TODO -cNew : Use Windows Messages to update the real-time activity log in GUI rather than creating a new thread to update each line in the GUI memo control. Done to improve performance in high traffic sites and to reduce number of threads used}

// New to VersionNumber = '4.0.0.774';
{TODO -cFix : When sending an NDR notification for a non-deliverable email, if the NDR also has delivery problems, these problems were note being logged, making it appear inthe logs as if the NDR was successful}
{TODO -cFix : SpamFilter could, in very rare occasions, freeze when processing the cleanup of the IP Blacklist Cache Limbo blacklist and the GreyList blacklist}
{TODO -cNew : Removed the logging of specific IPs being removed from the IP blacklist and limbo caches to improve performance and reduce risk of delays}

// New to VersionNumber = '4.0.0.773';
{TODO -cNew : Allowed to specify future dates in the GreyListAllowed.txt files so that IPs can be stored in the list for years without expiring}