Standard SMTP
No proprietary SDK required. HOST, PORT, USER, PASS — done.
// LAYER 9 SMTP
Layer 9 SMTPTransactional mail.
That actually delivers.
Authenticated SMTP relay for apps, websites, and businesses. Plug mail.l9s.io into Laravel, Node, WordPress, or anything that speaks SMTP — SPF, DKIM, DMARC, and TLS included.
£5Plans from /mo
587STARTTLS port
465Direct TLS
<10mTypical setup
// ABOUT THIS SERVICE
What Layer 9 SMTP is — in plain language.
Authenticated SMTP relay for apps, websites, and businesses. Plug mail.l9s.io into Laravel, Node, WordPress, or anything that speaks SMTP — SPF, DKIM, DMARC, and TLS included.
Operated by Layer 9 Solutions Ltd
UK Company No. 14857666. Registered office 124 City Road, London, EC1V 2NX. Related services: Hosting · VPN · SMTP · eSIM · Solutions hub.
// PLATFORM
What you actually get.
Clear capabilities — not buzzword grids.
Authentication stack
SPF, DKIM, and DMARC guidance so receivers trust your domain.
TLS everywhere
STARTTLS on 587 and direct TLS on 465 for secure transport.
Delivery visibility
Logs and webhooks on higher tiers so you can see what happened after send.
Clean relay reputation
IPs we monitor — not shared consumer pools that tank deliverability.
UK-operated
Relay infrastructure aligned with the rest of the Layer 9 stack.
// PRICING
Straightforward plans.
Published pricing. Upgrade when you need to — order in the client portal.
Dev
£5/mo- ✓ 1,000 emails / mo
- ✓ 1 sending domain
- ✓ SMTP auth
Starter
£10/mo- ✓ 10,000 emails / mo
- ✓ 1 sending domain
- ✓ SMTP / API
Professional
£20/mo- ✓ 25,000 emails / mo
- ✓ 3 domains
- ✓ Webhooks
Business
£35/mo- ✓ 75,000 emails / mo
- ✓ 10 domains
- ✓ Webhooks
Enterprise
Custom- ✓ 100,000+ emails
- ✓ Unlimited domains
- ✓ Dedicated IP
// WHO IT'S FOR
Built for real workloads.
SaaS products
Password resets, invites, invoices, and system alerts that need inbox placement.
E-commerce
Order confirmations and shipping updates without fighting shared hosting IP reputation.
Agencies
Reliable outbound mail for client sites without standing up Postfix yourself.
// HOW IT WORKS
Three steps to live.
Create a plan
Choose volume and domains in the portal.
Authenticate DNS
Add SPF/DKIM records we provide for your sending domain.
Send
Point your app at mail.l9s.io:587 with STARTTLS and your credentials.
// FAQ
Common questions.
About this service — quotable answers on pricing, setup, and what you actually get.
Is this for marketing blasts?
Layer 9 SMTP is built for transactional and application mail. Bulk marketing is restricted by our anti-spam policy.
Can I use WordPress?
Yes — configure any SMTP plugin with mail.l9s.io, port 587, and your portal credentials.
Do you support dedicated IPs?
Yes on supported higher tiers and Enterprise — ask sales if you need isolation.
// NEXT STEP
Stop guessing why mail never arrived.
Authenticated relay, clear plans, and integration that takes minutes — not a week of DNS archaeology.