mailinabox/management/templates/smtp-relays.html

<style>
</style>

<script>
	function checkfields() {
		let use_relay = document.getElementById("use_relay").checked
		let use_auth = document.getElementById("relay_use_auth").checked

		document.getElementById("relay_host").disabled = !use_relay
		document.getElementById("relay_use_auth").disabled = !use_relay
		document.getElementById("relay_auth_user").disabled = !use_relay && !use_auth
		document.getElementById("relay_auth_pass").disabled = !use_relay && !use_auth
	}
</script>

<h2>SMTP Relays</h2>

<p>SMTP Relays are third-party services you can hand off the responsability of getting the mail delivered. They
	can be useful when, for example, port 25 is blocked.</p>

<p>Here, you can configure an authenticated SMTP relay (for example, <a href="https://sendgrid.com/"
		target="_blank">SendGrid</a>) over port 587.</p>

<div id="smtp_relay_config">
	<h3>SMTP Relay Configuration</h3>
	<form class="form-horizontal" role="form" onsubmit="return false;">
		<div class="form-group">
			<table style="width: 600px">
				<tr>
					<td>
						<label for="use_relay" class="col-sm-1 control-label">Use Relay?</label>
					</td>
					<td>
						<div class="col-sm-10">
							<input type="checkbox" id="use_relay" name="use_relay" value="true"
								onclick="checkfields();">
						</div>
					</td>
				</tr>

				<tr>
					<td>
						<label for="relay_host" class="col-sm-1 control-label">Hostname</label>
					</td>
					<td>
						<div class="col-sm-10">
							<input type="text" class="form-control" id="relay_host" placeholder="host.domain.tld">
						</div>
					</td>
					<td style="padding: 0; font-weight: bold;">:587</td>
				</tr>

				<tr>
					<td>
						<label for="relay_use_auth" class="col-sm-1 control-label">Authenticate</label>
					</td>
					<td>
						<div class="col-sm-10">
							<input checked type="checkbox" id="relay_use_auth" name="relay_use_auth" value="true"
								onclick="checkfields();">
						</div>
					</td>
				</tr>

				<tr>
					<td>
						<label for="relay_auth_user" class="col-sm-1 control-label">Username</label>
					</td>
					<td>
						<div class="col-sm-10">
							<input type="text" class="form-control" id="relay_auth_user" placeholder="user">
						</div>
					</td>
				</tr>

				<tr>
					<td>
						<label for="relay_auth_pass" class="col-sm-1 control-label">Password/Key</label>
					</td>
					<td>
						<div class="col-sm-10">
							<input type="password" class="form-control" id="relay_auth_pass" placeholder="password">
						</div>
					</td>
				</tr>
			</table>
		</div>

		<div>
			<button type="submit" class="btn btn-primary">Update</button>
		</div>
	</form>
</div>