SMTP relay · REST API · MCP for AI agents

Order emails that reach the inbox.

SMTP relay and REST API for webshops and the agencies that run them. SPF, DKIM and DMARC verified per domain, every message logged, reputation scored. One plan, no contract.

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99.8%

delivery rate

0.42s

average delivery time

100%

SPF · DKIM · DMARC passing

Example workspace data

SMTP.software dashboard with email activity, domain health and reputation

14,286 delivered

Wednesday, October 2199.8%

northstar.exampleVerified

Reputation

98/100 · top 5%

Works with anything that speaks SMTP

MagentoWooCommerceShopifyLightspeedShopwarePrestaShopWordPressLaravel / PHPMailCampaigns

What you get

Everything between “send” and “delivered”.

No marketing suite. Just the infrastructure a webshop needs to get order confirmations, password resets and invoices into the inbox — and proof that they got there.

SMTP relay

Point your shop at send.smtp.software:465 with per-domain credentials. No code changes.

REST API & MCP

Register domains, send messages, read logs — from your code over JSON, or from an AI agent through our MCP server. One account, with separate scoped MCP access.

Domain authentication

SPF, DKIM, DMARC and tracking records generated per domain. Re-checked every 5 minutes until verified, every 24 hours after.

Mail logs

Per-message status — accepted, processed, delivered, queued, bounced — with delivery time and authentication results. Search by recipient or reference id.

Tracking, bounces, abuse

Opens and clicks on your own track. subdomain. Bounce, abuse and DMARC reports processed automatically.

Reputation score

A 0–100 score per domain built from sent, bounced, spam-marked and opened mail — so you see trouble before inbox providers act on it.

All features

How it works

Live in three steps. Usually within the hour.

Add a sending domain

shop.example or a subdomain like mail.shop.example. In the dashboard, or one POST /domains.

Publish the DNS records

We generate SPF, DKIM, DMARC and the tracking CNAME for you. Verification runs automatically — or trigger it instantly.

Connect SMTP or the API

Host send.smtp.software, port 465 (SSL), per-domain credentials. Or POST JSON to /{domain}/message.

Domain details with DNS configuration for SPF, DKIM, DMARC and return path

Deliverability & reputation

A score you can act on — before Gmail decides for you.

Every sending domain gets a daily 0–100 reputation built from sent, bounced, spam-marked and opened mail. Bounces, abuse complaints and DMARC reports are processed for you.

Delivery, bounce and authentication rates per day, per domain

Shared pool by default, dedicated IP from 50,000 emails a month

Suggestions when a domain needs attention — a missing record, a volume spike

Sender reputation

Top 5%

98/100

SPF

Your sending servers are authorised.

Passing

DKIM

Every message is signed and trusted.

Passing

DMARC

Your domain is protected.

Passing

POST https://smtp.software/api/shop.example/message
{
"from": { "address": "orders@shop.example", "name": "Shop" },
"to": [{ "address": "emma@example.com", "name": "Emma" }],
"subject": "Your order #10482 is confirmed",
"template": "order-confirmation",
"html": "<p>Thanks Emma, it's on its way.</p>",
"attachments": [{ "filename": "Invoice.pdf", "data": "JVBERi0x…" }],
"tags": [{ "title": "order", "name": "10482" }]
}
→ 200 · "status": true · refid c4ca4238a0b9…

For developers

SMTP when you can. JSON when you can’t.

Legacy shop on SMTP, headless storefront on the API, agency tooling on both. Same domains, same logs, same reputation. Domain onboarding is fully scriptable: register, read the DNS set, verify.

POST /domains GET /domains/{domain} POST /domains/{domain}/verify POST /{domain}/message GET /{domain}/logs MCP · tools for AI agents

Read the developer docs

Our customers