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Mail Server EXPN/VRFY/HELP/ESMTP/EHLO information disclosure

A vulnerability, which was classified as problematic, has been found in Mail Server (Mail Server Software) (unknown version). This issue affects some unknown processing of the component EXPN/VRFY/HELP/ESMTP/EHLO. There is no information about possible countermeasures known. It may be suggested to replace the affected object with an alternative product. Attack attempts may be identified with Snort ID 660.