IPSwitch IMail 6.0.5 allows remote attackers to cause a denial of service using the SMTP AUTH command by sending a base64-encoded user password whose length is between 80 and 136 bytes.

Buffer overflow in the LDAP component of Ipswitch IMail 7.1 and earlier allows remote attackers to execute arbitrary code via a long "bind DN" parameter.

Unknown vulnerability in the Web calendaring component of Ipswitch IMail Server before 8.13 allows remote attackers to cause a denial of service (crash) via "specific content."

Multiple features in Ipswitch IMail Server before 8.13 allow remote attackers to cause a denial of service (crash) via (1) a long sender field to the Queue Manager or (2) a long To field to the Web Messaging component.

The STARTTLS implementation in the server in Ipswitch IMail 11.03 and earlier does not properly restrict I/O buffering, which allows man-in-the-middle attackers to insert commands into encrypted SMTP sessions by sending a cleartext command that is processed after TLS is in place, related to a "plaintext command injection" attack, a similar issue to CVE-2011-0411.