Reliable Email
Delivery at Scale
Without the Headaches

Transactional emails, bulk campaigns, and SMTP relay — all from one managed platform. High deliverability, bounce handling, and real-time tracking built in.

Request Email API View Pricing
99.5%
Deliverability
500ms
Avg Send Time
100+
HTML Templates
send_email.php PHP 
// Send transactional email via API Services
$client = new GuzzleHttp\Client();

$response = $client->post('https://api.apiservices.io/email/send', [
    'headers' => [
        'Authorization' => 'Bearer ' . $apiKey,
    ],
    'json' => [
        'to'      => 'customer@example.com',
        'from'    => 'noreply@yourdomain.com',
        'subject' => 'Order Confirmed #12345',
        'html'    => '<h1>Thank you!</h1><p>Your order is confirmed.</p>',
        'template_id' => 'order-confirm-v2',
        'track_opens' => true,
    ],
]);

$result = json_decode($response->getBody(), true);
// $result['message_id'] = 'msg_Xk9mNz2pQrL'
What's Included

Complete Email Infrastructure

From single transactional sends to million-subscriber campaigns — one API covers everything.

Transactional Email

Send order confirmations, receipts, password resets, and account alerts — triggered by user actions in real time.

Receipts Alerts Resets
Bulk Email

Send newsletters, promotional campaigns, and product announcements to thousands of subscribers with ease.

Newsletters Campaigns Lists
SMTP Relay

Use your own domain and sending address through our high-deliverability SMTP relay infrastructure. SPF, DKIM, DMARC ready.

Custom Domain DKIM DMARC
Email Templates

Choose from 100+ pre-built, responsive HTML email templates. Customize with your branding and variables.

100+ Templates Responsive Variables
Delivery Reports

Track opens, clicks, bounces, unsubscribes, and spam complaints in real time via dashboard or webhook.

Open Rate Click Rate Webhooks
Bounce Management

Automatic hard/soft bounce detection and list suppression. Protect your sender reputation effortlessly.

Auto-Suppress Hard Bounce Soft Bounce
Industry Use Cases

Email for Every Business

From solo developers to enterprise teams — our Email API fits every workflow.

E-Commerce

Trigger order confirmations, shipping updates, delivery notifications, and review requests automatically as customers move through the purchase funnel.

Transactional Templates
Marketing Teams

Run segmented email campaigns, A/B test subject lines, and track conversion metrics — all without managing your own mail servers or deliverability.

Bulk Email Analytics
SaaS Onboarding

Guide new users from sign-up to activation with automated welcome sequences, feature announcements, and lifecycle emails that increase retention.

SMTP Transactional
Integration Examples

Simple, Powerful Integration

Send your first email in under 5 minutes with our ready-made code snippets.

// Single transactional email with template
$http = new GuzzleHttp\Client();

$res = $http->post('https://api.apiservices.io/email/send', [
    'headers' => ['Authorization' => 'Bearer ' . $apiKey],
    'json'    => [
        'to'          => 'user@example.com',
        'from'        => 'hello@yourdomain.com',
        'subject'     => 'Welcome to our platform!',
        'template_id' => 'welcome-email-v3',
        'variables'   => [
            'name'       => 'John Doe',
            'login_url'  => 'https://app.example.com/login',
        ],
        'track_opens'  => true,
        'track_clicks' => true,
    ],
]);
// Response: {"message_id":"msg_Xk9mNz2pQrL","status":"queued"}
// Bulk email campaign to a list
$http = new GuzzleHttp\Client();

$res = $http->post('https://api.apiservices.io/email/campaign', [
    'headers' => ['Authorization' => 'Bearer ' . $apiKey],
    'json'    => [
        'campaign_name' => 'Summer Sale 2025',
        'list_id'       => 'list_subscribers_v2',
        'subject'       => '50% off — Today Only!',
        'template_id'   => 'promo-summer',
        'schedule_at'   => '2025-07-01T09:00:00Z',
        'unsubscribe_link' => true,
    ],
]);
// Response: {"campaign_id":"camp_9xRzQ4","recipients":14250}
Technical Specs

Built for Performance

High throughput, enterprise-grade infrastructure that scales with your sending volume.

See Pricing Plans
Specification Details
Setup Time 24 – 48 Hours
Billing Cycle Monthly (cancel any time)
Support Email + Live Chat
Code Snippets PHP, JavaScript, Python
Encryption TLS 1.3 Enforced
Dashboard Full Access
Got Questions?

Frequently Asked Questions

Common questions about our Email API service.

Daily sending limits depend on your plan. The Starter plan allows up to 5,000 emails/day; the Pro plan goes up to 100,000/day; Enterprise plans have custom limits based on your volume. All limits are clearly visible in your dashboard with real-time usage counters. Overage billing is available at a flat per-email rate.
Yes. All plans include custom domain support. You'll need to add three DNS records (SPF, DKIM TXT, and a DMARC policy) that we provide. Once verified, your emails send from your own domain with full brand consistency. Domain verification typically takes under 10 minutes.
Absolutely. You can send fully custom HTML emails or choose from 100+ pre-built responsive templates in our library. Templates support dynamic variables (e.g., {{name}}, {{order_id}}), conditional blocks, and inline style inlining for maximum email client compatibility across Gmail, Outlook, Apple Mail, and mobile.
We enforce CAN-SPAM and GDPR compliance automatically. Every bulk email includes a mandatory unsubscribe link. Our infrastructure maintains warm IP pools, reputation monitoring, and real-time blacklist checks. Bounce rates and spam complaint rates are capped per our terms — accounts exceeding thresholds are flagged before suspension to give you time to resolve issues.