offlineimap before 6.3.4 added support for SSL server certificate validation but it is still possible to use SSL v2 protocol, which is a flawed protocol with multiple security deficiencies.Referenceshttps://security-tracker.debian.org/tracker/CVE-2010-4533https://bugzilla.redhat.com/show_bug.cgi?id=CVE-2010-4533https://access.redhat.com/security/cve/cve-2010-4533https://www.openwall.com/lists/oss-security/2010/12/23/2https://bugs.debian.org/cgi-bin/bugreport.cgi?bug=606962
