HP-UX Reference (11i v2 07/12) - 1 User Commands A-M (vol 1)

e
elm(1) elm(1)
defined as:
num The index number of the attachment.
filename The name of the attached file.
size The size of the attachment in bytes, computed from the file or the message.
type/subtype The type and subtype of the attachment. This value is placed or found in a
Content-Type: header.
encoding The encoding type. This value is placed or found in a
Content-Transfer-
Encoding:
header.
File Attachment
elm still supports the old method where you have one or more key lines of the form:
[include file contenttype/subtype [encoding]
]
A file which needs to be attached with the mail is included in the body of the message and it becomes a part
of the message. The text lines before, between and after the
include lines go into different attachments.
The encoding parameter is optional. Refer to RFC 1341 for information on valid contenttype/subtype and
encoding parameter values.
Example: To include a file,
cartoon.gif , into your message and you want to use base-64 encoding, use
the following line:
[include cartoon.gif image/gif base64]
Or if you want to include a text file , foo.txt, which contains plain ASCII, use the following line:
[include foo.txt text/plain]
Message Encryption
For enhanced security and privacy, you can encrypt a message with the key lines:
[encode] and
[clear].
Consider the following outgoing message:
Hi Tom,
How are you doing?
[encode]
This is a private message!!
[clear]
Keep in touch.
- Jerry
The [clear] line signifies the end of encryption for the block from [encode] to
[clear].
The above message is readable while being typed into the editor and as soon as the message is confirmed as
wanting to be sent, the
elm mailer prompts you with the following:
Enter encryption key: @
It accepts a key (a series of 8 or less characters) without echoing them to the screen. You will need to re-
enter the key. If you have the copy option enabled, the program will save your copy of the message in
encrypted form. This helps you ensure privacy and security of your mail archive.
If you are not prompted by the mailer to enter the encryption key, you do not have [encode] entered as
the first 8 characters of the line. Similarly, [clear] should also be entered as the first 7 characters of the
line to indicate the end of encryption.
On the other end, the recipients of this mail (should be users of the elm program) will be prompted with
the following message to enter the decryption key:
Enter decryption key: @
If the decryption key is correct, the program will then decrypt the mail and display each line in readable
format. The same message will be displayed in an encrypted form if the decryption key is incorrect.
Note: Currently decryption is not supported to pipe or print encrypted mails.
290 Hewlett-Packard Company − 15 − HP-UX 11i Version 2: December 2007 Update