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<title>Sending PGP - The MH-E Manual</title>
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<h3 class="section">9.7 Signing and Encrypting Messages</h3>
<p><a name="index-signing-messages-1443"></a><a name="index-encrypting-messages-1444"></a><a name="index-RFC-3156-1445"></a>
MH-E can sign and encrypt messages as defined in
<a href="http://www.rfc-editor.org/rfc/rfc3156.txt">RFC 3156</a>. If you
should choose to sign or encrypt your message, use one of the
following commands to do so any time before sending your message.
<p><a name="index-mh_002dmml_002dsecure_002dmessage_002dencrypt-1446"></a><a name="index-mh_002dmml_002dsecure_002dmessage_002dsign-1447"></a><a name="index-mh_002dmml_002dsecure_002dmessage_002dsignencrypt-1448"></a><a name="index-C_002dc-C_002dm-C_002de-1449"></a><a name="index-C_002dc-C_002dm-C_002ds-1450"></a><a name="index-C_002dc-C_002dm-e-e-1451"></a><a name="index-C_002dc-C_002dm-e-s-1452"></a><a name="index-C_002dc-C_002dm-s-e-1453"></a><a name="index-C_002dc-C_002dm-s-s-1454"></a>
The command <kbd>C-c C-m C-s</kbd> (<code>mh-mml-secure-message-sign</code>)
inserts the following tag:
<pre class="smallexample"> <#secure method=pgpmime mode=sign>
</pre>
<p>This is used to sign your message digitally. Likewise, the command
<kbd>C-c C-m C-e</kbd> (<code>mh-mml-secure-message-encrypt</code>) inserts the
following tag:
<pre class="smallexample"> <#secure method=pgpmime mode=encrypt>
</pre>
<p>This is used to encrypt your message. Finally, the command <kbd>C-c
C-m s e</kbd> (<code>mh-mml-secure-message-signencrypt</code>) inserts the
following tag:
<pre class="smallexample"> <#secure method=pgpmime mode=signencrypt>
</pre>
<p><a name="index-mh_002dmml_002dunsecure_002dmessage-1455"></a><a name="index-C_002dc-C_002dm-C_002dn-1456"></a><a name="index-C_002dc-C_002dm-n-1457"></a><a name="index-mh_002dmml_002dmethod_002ddefault-1458"></a>
This is used to sign and encrypt your message. In each of these cases,
a proper multipart message is created for you when you send the
message. Use the command <kbd>C-c C-m C-n</kbd>
(<code>mh-mml-unsecure-message</code>) to remove these tags. Use a prefix
argument (as in <kbd>C-u C-c C-m s e</kbd>) to be prompted for one of the
possible security methods (see <code>mh-mml-method-default</code>).
<p><a name="index-mh_002dmml_002dmethod_002ddefault-1459"></a>
The option <code>mh-mml-method-default</code> is used to select between a
variety of mail security mechanisms. The default is `<samp><span class="samp">PGP (MIME)</span></samp>'
if it is supported; otherwise, the default is `<samp><span class="samp">None</span></samp>'. Other
mechanisms include vanilla `<samp><span class="samp">PGP</span></samp>' and `<samp><span class="samp">S/MIME</span></samp>'.
<p><a name="index-g_t_0040samp_007bpgg_007d-customization-group-1460"></a><a name="index-PGG-1461"></a><a name="index-customization-group_002c-_0040samp_007bpgg_007d-1462"></a>
The `<samp><span class="samp">pgg</span></samp>' customization group may have some settings which may
interest you.
See
<a href="http://www.dk.xemacs.org/Documentation/packages/html/pgg.html"><cite>The PGG Manual</cite></a>.
<p><a name="index-header-field_002c-_0040samp_007bFcc_003a_007d-1463"></a><a name="index-g_t_0040samp_007bFcc_003a_007d-header-field-1464"></a><a name="index-pgg_002dencrypt_002dfor_002dme-1465"></a>
In particular, I turn on the option <code>pgg-encrypt-for-me</code> so that
all messages I encrypt are encrypted with my public key as well. If
you keep a copy of all of your outgoing mail with a `<samp><span class="samp">Fcc:</span></samp>' header
field, this setting is vital so that you can read the mail you write!
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