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__TOC__

==Summary==

<b>Email Relay</b> is an e-mail store-and-forward message transfer agent and proxy server. The service does three things:
* Stores any incoming e-mail messages that it receives
* Forwards e-mail messages on to another remote e-mail server
* Serves up stored e-mail messages to local e-mail reader programs

More technically, it acts as a SMTP storage daemon, a SMTP forwarding agent, and a POP3 server.

----

This manual page provides an overview of the Email Relay functionality in {{{name}}} devices.

<b>Note:</b> Email Relay is additional software that can be installed from the <b>System → [[{{{name}}} Package Manager|Package Manager]]</b> page.</u>

==Email Relay Configuration==

This section displays Email Relays that are currently configured on the router. By default the list is empty. To add a new email relay, enter instance name, choose service mode and press 'Add'.

[[File:Networking_rutos_manual_email_relay_add_new_instance_v1.png|border|class=tlt-border]]

==Server==

[[File:Networking_rutos_manual_email_relay_configuration_server_mode_v1.png|border|class=tlt-border]]

<table class="nd-mantable">
<tr>
<th>Field</th>
<th>Value</th>
<th>Description</th>
</tr>
<tr>
<td>Enable</td>
<td>off | on; default: <b>off</b></td>
<td>Enables this email relay instance.</td>
</tr>
<tr>
<td>Mode</td>
<td>Server | Proxy | Command line; default: <b>Server</b></td>
<td>Instance mode.</td>
</tr>
<tr>
<td>SMTP port</td>
<td>integer [1..65535]; default: <b>none</b></td>
<td>SMTP Port to listen incoming connections.</td>
</tr>
<tr>
<td>POP port</td>
<td>integer [1..65535]; default: <b>none</b></td>
<td>POP Port to listen incoming connections.</td>
</tr>
<tr>
<td>Remote clients</td>
<td>off | on; default: <b>off</b></td>
<td>To allow connections from anywhere. By default only local allowed.</td>
</tr>
<tr>
<td>Address verifier</td>
<td>string; default: <b>none</b></td>
<td>Runs the specified external program to verify a message recipient's e-mail address.</td>
</tr>
<tr>
<td>Domain</td>
<td>domain name; default: <b>none</b></td>
<td>Specifies the network name that is used in SMTP EHLO. The default is derived from a DNS lookup of the local hostname.</td>
</tr>
<tr>
<td>Anonymous</td>
<td>off | on; default: <b>off</b></td>
<td>Disables the server's SMTP VRFY command.</td>
</tr>
<tr>
<td>Server TLS</td>
<td>off | <span style="color:blue">on</span>; default: <b>off</b></td>
<td>Enables TLS for incoming SMTP and POP connections.</td>
</tr>
<tr>
<td><span style="color:blue">TLS certificate</span></td>
<td>.pem certificate; default: <b>none</b></td>
<td>Specifies a PEM-format file containing a X.509 certificate and private key.</td>
</tr>
<tr>
<td>SMTP authentication</td>
<td>off | <span style="color:red">on</span>; default: <b>off</b></td>
<td>Enables SMTP server authentication of remote SMTP clients.</td>
</tr>
<tr>
<td><span style="color:red">SMTP Username</span></td>
<td>string; default: <b>none</b></td>
<td>Username for authentication with the SMTP server.</td>
</tr>
<tr>
<td><span style="color:red">SMTP Password</span></td>
<td>string; default: <b>none</b></td>
<td>Password for authentication with the SMTP server.</td>
</tr>
<tr>
<td>POP Username</td>
<td>string; default: <b>none</b></td>
<td>Username for authentication with the POP server.</td>
</tr>
<tr>
<td>POP Password</td>
<td>string; default: <b>none</b></td>
<td>Password for authentication with the POP server.</td>
</tr>
</table>

==Proxy==

[[File:Networking_rutos_manual_email_relay_configuration_prox_mode_v1.png|border|class=tlt-border]]

<table class="nd-mantable">
<tr>
<th>Field</th>
<th>Value</th>
<th>Description</th>
</tr>
<tr>
<td>Enable</td>
<td>off | on; default: <b>off</b></td>
<td>Enables this email relay instance.</td>
</tr>
<tr>
<td>Mode</td>
<td>Server | Proxy | Command line; default: <b>Server</b></td>
<td>Instance mode.</td>
</tr>
<tr>
<td>SMTP port</td>
<td>integer [1..65535]; default: <b>none</b></td>
<td>SMTP Port to listen incoming connections.</td>
</tr>
<tr>
<td>Remote clients</td>
<td>off | on; default: <b>off</b></td>
<td>To allow connections from anywhere. By default only local allowed.</td>
</tr>
<tr>
<td>Address verifier</td>
<td>string; default: <b>none</b></td>
<td>Runs the specified external program to verify a message recipient's e-mail address.</td>
</tr>
<tr>
<td>Domain</td>
<td>domain name; default: <b>none</b></td>
<td>Specifies the network name that is used in SMTP EHLO. The default is derived from a DNS lookup of the local hostname.</td>
</tr>
<tr>
<td>Anonymous</td>
<td>off | on; default: <b>off</b></td>
<td>Disables the server's SMTP VRFY command.</td>
</tr>
<tr>
<td>Server TLS</td>
<td>off | <span style="color:blue">on</span>; default: <b>off</b></td>
<td>Enables TLS for incoming SMTP and POP connections.</td>
</tr>
<tr>
<td><span style="color:blue">TLS certificate</span></td>
<td>.pem certificate; default: <b>none</b></td>
<td>Specifies a PEM-format file containing a X.509 certificate and private key.</td>
</tr>
<tr>
<td>SMTP authentication</td>
<td>off | <span style="color:red">on</span>; default: <b>off</b></td>
<td>Enables SMTP server authentication of remote SMTP clients.</td>
</tr>
<tr>
<td><span style="color:red">SMTP Username</span></td>
<td>string; default: <b>none</b></td>
<td>Username for authentication with the SMTP server.</td>
</tr>
<tr>
<td><span style="color:red">SMTP Password</span></td>
<td>string; default: <b>none</b></td>
<td>Password for authentication with the SMTP server.</td>
</tr>
<tr>
<td>Smarthost</td>
<td>ip:port | domain name:port; default: <b>none</b></td>
<td>Specify the SMTP to forward emails.</td>
</tr>
<tr>
<td>Client TLS</td>
<td>off | on; default: <b>off</b></td>
<td>Enables negotiated TLS for outgoing SMTP connections.</td>
</tr>
<tr>
<td>Client authentication</td>
<td>off | <span style="color:cyan">on</span>; default: <b>off</b></td>
<td>Enables SMTP client authentication with the remote server.</td>
<tr>
<td><span style="color:cyan">Username</span></td>
<td>string; default: <b>none</b></td>
<td>Username for authentication with the remote server.</td>
</tr>
<tr>
<td><span style="color:cyan">Password</span></td>
<td>string; default: <b>none</b></td>
<td>Password for authentication with the remote server.</td>
</tr>
</table>

==Command line==

[[File:Networking_rutos_manual_email_relay_configuration_command_line_mode_v1.png|border|class=tlt-border]]

<table class="nd-mantable">
<tr>
<th>Field</th>
<th>Value</th>
<th>Description</th>
</tr>
<tr>
<td>Enable</td>
<td>off | on; default: <b>off</b></td>
<td>Enables this email relay instance.</td>
</tr>
<tr>
<td>Extra command line</td>
<td>string; default: <b>none</b></td>
<td>Extra command line options.</td>
</tr>
</table>

[[Category:{{{name}}} Services section]]

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