Becky! 2.00.05 and earlier can allow a remote attacker to gain additional privileges via a buffer overflow attack on long messages without newline characters.
Buffer overflow in Becky! Internet Mail client 1.26.03 and earlier allows remote attackers to cause a denial of service via a long Content-type: MIME header when the user replies to a message.
Buffer overflow in Becky! Internet Mail client 1.26.04 and earlier allows remote attackers to cause a denial of service via a long Content-type: MIME header when the user forwards a message.