Unknown vulnerability in the LIST functionality in CommuniGate Pro before 4.3c3 allows remote attackers to cause a denial of service (server crash) via certain multipart messages.
Stalker Internet Mail Server 1.6 allows a remote attacker to cause a denial of service (crash) via a long HELO command.
Unspecified vulnerability in the POP service in Stalker CommuniGate Pro 5.1c1 and earlier allows remote attackers to cause a denial of service (server crash) via unspecified vectors involving opening an empty inbox.