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MH-MAIL(5) [nmh-1.2] MH-MAIL(5)
NAME
mh-mail - message format for nmh message system
SYNOPSIS
any nmh command
DESCRIPTION
nmh processes messages in a particular format. It should be noted that although neither
Bell nor Berkeley mailers produce message files in the format that nmh prefers, nmh can
read message files in that antiquated format.
Each user possesses a mail drop box which initially receives all messages processed by
post. Inc will read from that drop box and incorporate the new messages found there into
the user's own mail folders (typically "+inbox"). The mail drop box consists of one or
more messages.
Messages are expected to consist of lines of text. Graphics and binary data are not han-
dled. No data compression is accepted. All text is clear ASCII 7-bit data.
The general "memo" framework of RFC-822 is used. A message consists of a block of infor-
mation in a rigid format, followed by general text with no specified format. The rigidly
formatted first part of a message is called the header, and the free-format portion is
called the body. The header must always exist, but the body is optional. These parts are
separated by an empty line, i.e., two consecutive newline characters. Within nmh , the
header and body may be separated by a line consisting of dashes:
To:
cc:
Fcc: +outbox
Subject:
--------
The header is composed of one or more header items. Each header item can be viewed as a
single logical line of ASCII characters. If the text of a header item extends across sev-
eral real lines, the continuation lines are indicated by leading spaces or tabs.
Each header item is called a component and is composed of a keyword or name, along with
associated text. The keyword begins at the left margin, may NOT contain spaces or tabs,
may not exceed 63 characters (as specified by RFC-822), and is terminated by a colon
(`:'). Certain components (as identified by their keywords) must follow rigidly defined
formats in their text portions.
The text for most formatted components (e.g., "Date:" and "Message-Id:") is produced auto-
matically. The only ones entered by the user are address fields such as "To:", "cc:",
etc. Internet addresses are assigned mailbox names and host computer specifications. The
rough format is "local@domain", such as "MH@UCI", or "MH AT UCI-ICSA.ARPA". Multiple
addresses are separated by commas. A missing host/domain is assumed to be the local
host/domain.
As mentioned above, a blank line (or a line of dashes) signals that all following text up
to the end of the file is the body. No formatting is expected or enforced within the
body.
Following is a list of header components that are considered meaningful to various nmh
programs.
Date:
Added by post, contains date and time of the message's entry into the mail transport
system.
From:
Added by post, contains the address of the author or authors (may be more than one if
a "Sender:" field is present). For a standard reply (using repl, the reply address
is constructed by checking the following headers (in this order): "Mail-Reply-To:",
"Reply-To:", "From:", "Sender:".
Mail-Reply-To:
For a standard reply (using repl), the reply address is constructed by checking the
following headers (in this order): "Mail-Reply-To:", "Reply-To:", "From:", "Sender:".
Mail-Followup-To:
When making a "group" reply (using repl -group), any addresses in this field will
take precedence, and no other reply address will be added to the draft. If this
header is not available, then the return addresses will be constructed from the
"Mail-Reply-To:", or "Reply-To:", or "From:", along with adding the addresses from
the headers "To:", "cc:", as well as adding your personal address.
Reply-To:
For a standard reply (using repl), the reply address is constructed by checking the
following headers (in this order): "Mail-Reply-To:", "Reply-To:", "From:", "Sender:".
Sender:
Added by post in the event that the message already has a "From:" line. This line
contains the address of the actual sender.
To:
Contains addresses of primary recipients.
cc:
Contains addresses of secondary recipients.
Bcc:
Still more recipients. However, the "Bcc:" line is not copied onto the message as
delivered, so these recipients are not listed. nmh uses an encapsulation method for
blind copies, see send.
Fcc:
Causes post to copy the message into the specified folder for the sender, if the mes-
sage was successfully given to the transport system.
Message-ID:
A unique message identifier added by post if the -msgid flag is set.
Subject:
Sender's commentary. It is displayed by scan.
In-Reply-To:
A commentary line added by repl when replying to a message.
Resent-Date:
Added when redistributing a message by post.
Resent-From:
Added when redistributing a message by post.
Resent-To:
New recipients for a message resent by dist.
Resent-cc:
Still more recipients. See "cc:" and "Resent-To:".
Resent-Bcc:
Even more recipients. See "Bcc:" and "Resent-To:".
Resent-Fcc:
Copy resent message into a folder. See "Fcc:" and "Resent-To:".
Resent-Message-Id:
A unique identifier glued on by post if the -msgid flag is set. See "Message-Id:"
and "Resent-To:".
Resent:
Annotation for dist under the -annotate option.
Forwarded:
Annotation for forw under the -annotate option.
Replied:
Annotation for repl under the -annotate option.
FILES
/var/mail/$USER Location of mail drop
SEE ALSO
Standard for the Format of ARPA Internet Text Messages (RFC-822)
CONTEXT
None
MH.6.8 1 Jul 2003 MH-MAIL(5)
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On Apache
Under GNU General Public License
2012-05-25 23:05 @38.107.179.239 Crawled by CCBot/1.0 (+http://www.commoncrawl.org/bot.html)