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specifies that Encryption Types for


LZW LZW format [RFC1505]

Message Encapsulated Message [RFC822]

PEM, PEM-Clear Privacy Enhanced Mail [RFC1421]

PGP Pretty Good Privacy [RFC1505]

Postscript Postscript format [POSTSCRIPT]

Shar Shell Archive format [RFC1505]

Signature Signature [RFC1505]

Tar Tar format [RFC1505]

Text Text [IS-10646]

uuencode uuencode format [RFC1505]

URL external URL-reference [RFC1505]

MAIL ENCRYPTION TYPES

[RFC822] specifies that Encryption Types for mail may be assigned.

There are currently no RFC 822 encryption types assigned. Please use

instead the Mail Privacy procedures defined in [RFC1421, RFC1422,

RFC1423].

ESMTP MAIL KEYWORDS

[RFC1651] specifies that extension to SMTP can be identified with

keywords.

Keywords Description Reference

Reynolds & Postel [Page 83]

RFC 1700 Assigned Numbers October 1994

------------ -------------------------------- ---------

SEND Send as mail [RFC821]

SOML Send as mail or terminal [RFC821]

SAML Send as mail and terminal [RFC821]

EXPN Expand the mailing list [RFC821]

HELP Supply helpful information [RFC821]

TURN Turn the operation around [RFC821]

8BITMIME Use 8-bit data [RFC1652]

SIZE Message size declaration [RFC1653]

VERB Verbose [Eric Allman]

ONEX One message transaction only [Eric Allman]

MAIL EXTENSION TYPES

The Simple Mail Transfer Protocol [RFC821] specifies a set of

commands or services for mail transfer. A general procedure for

extending the set of services is defined in [RFC1651]. The set of

service extensions is listed here.

Service Ext EHLO Keyword Parameters Verb Reference

----------- ------------ ---------- ---------- ---------

Send SEND none SEND [RFC821]

Send or Mail SOML none SOML [RFC821]

Send and Mail SAML none SAML [RFC821]

Expand EXPN none EXPN [RFC821]

Help HELP none HELP [RFC821]

Turn TURN none TURN [RFC821]

8 Bit MIME 8BITMIME none none [RFC1652]

Size SIZE number none [RFC1653]

MAIL SYSTEM NAMES

In some places, an identification of other mail systems is used.

One of these is in "The COSINE and Internet X.500 Schema" (section


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