Log Message:
Update to 2.5.2. From the announcement message:

This is mostly a minor bugfix release.  One of the fixes, however, repairs
a variable scope problem that could cause false negatives during SSP
checks.  Thus, an upgrade is advised if you're running 2.5.0 or 2.5.1.

The formal release notes entry:

2.5.2           2008/03/28
        Preserve the sender's domain name outside of mlfi_eoh() as it's
                now needed in mlfi_eom().  Problem noted by Andy Fiddaman.
        Fix bug #SF1921873: Pass "-K" command line switch into the new
                configuration handling code.  Problem noted by Al Smith.
        TOOLS: Fix flags portion of the TXT record output by dkim-genkey.
                Problem noted by Michael Carland.
        BUILD: Fix bug #SF1922422: Fix linker problems when POPAUTH is
                defined.