mailinabox/management/templates/smtp-relays.html

<style>
</style>

<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="set_smtp_relay_config(); return false;">
		<div class="form-group">
			<table id="smtp-relays" class="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>

<script>
	const use_relay = document.getElementById("use_relay")
	const relay_host = document.getElementById("relay_host")
	const relay_use_auth = document.getElementById("relay_use_auth")
	const relay_auth_user = document.getElementById("relay_auth_user")
	const relay_auth_pass = document.getElementById("relay_auth_pass")

	function checkfields() {
		let relay_enabled = use_relay.checked
		let auth_enabled = relay_use_auth.checked

		relay_host.disabled = !relay_enabled
		relay_use_auth.disabled = !relay_enabled
		relay_auth_user.disabled = !(relay_enabled && auth_enabled)
		relay_auth_pass.disabled = !(relay_enabled && auth_enabled)
	}

	function show_smtp_relays() {
		api(
			"/system/smtp/relay",
			"GET",
			{},
			data => {
				use_relay.checked = data.enabled
				relay_host.value = data.host
				relay_use_auth.checked = data.auth_enabled
				relay_auth_user.value = data.user
				relay_auth_pass.value = ""

				checkfields()
			}
		)
	}

	function set_smtp_relay_config() {
		api(
			"/system/smtp/relay",
			"POST",
			{
				enabled: use_relay.checked,
				host: relay_host.value,
				auth_enabled: relay_use_auth.checked,
				user: relay_auth_user.value,
				key: relay_auth_pass.value
			},
			() => {
				show_modal_error("Done!", "The configuration has been updated and Postfix was restarted successfully. Please make sure everything is functioning as intended.", () => {
					return false
				})
			},
			(text, xhr) => {
				if (xhr.status != 403) {
					show_modal_error("Error", `<h5>${xhr}</h5><br><pre>${text}</pre><br>Welp, oof`)
				}
			}
		)
	}
</script>