The Mailbox Update (MUPDATE) Distributed Mailbox Database Protocol. - Robert Siemborski (RFC, 2003)

SMTP Service Extension for Authentication. - Robert Siemborski; Alexey Melnikov 001 (RFC, 2007)

The Post Office Protocol (POP3) Simple Authentication and Security Layer (SASL) Authentication Mechanism. - Robert Siemborski; Abhijit Menon-Sen (RFC, 2007)

IMAP Extension for Simple Authentication and Security Layer (SASL) Initial Client Response. - Robert Siemborski; Arnt Gulbrandsen (RFC, 2007)