Lotus Domino SMTP server 4.63 through 5.08 allows remote attackers to cause a denial of service (CPU consumption) by forging an email message with the sender as bounce@[127.0.0.1] (localhost), which causes Domino to enter a mail loop.
Multiple buffer overflows in the ESMTP service of Lotus Domino 5.0.2c and earlier allow remote attackers to cause a denial of service and possibly execute arbitrary code via long (1) "RCPT TO," (2) "SAML FROM," or (3) "SOML FROM" commands.
SMTP component of Lotus Domino 4.6.1 on AS/400, and possibly other operating systems, allows a remote attacker to crash the mail server via a long string.