This indicates an attack attempt to exploit a Directory Traversal Vulnerability in SecurEnvoy SecurMail.
A remote, authenticated attacker could exploit this vulnerability by sending a crafted HTTP request to a vulnerable server. Successful exploitation could result in arbitrary file access on the target server.
SecurEnvoy SecurMail 9.1.501
Information Disclosure: Remote attackers can gain sensitive information from vulnerable systems.
Apply the most recent upgrade or patch from the vendor.