Buffer overflow in SMTP service of Lotus Domino 5.0.4 and earlier allows remote attackers to cause a denial of service and possibly execute arbitrary commands via a long ENVID keyword in the "MAIL FROM" command.
https://exchange.xforce.ibmcloud.com/vulnerabilities/5488
https://euvd.enisa.europa.eu/vulnerability/EUVD-2000-1034
http://www.securityfocus.com/bid/1905