Enterprise SMTP Relay Built for Complex Requirements
When other providers focus only on volume, we excel at delivering specialized solutions for your unique email challenges.
- Dedicated IPs with warming assistance
- Sub-second delivery, 99.9% uptime SLA
- DKIM, SPF & DMARC fully managed
- White-glove setup by delivery experts
# SMTP Configuration
SMTP_HOST=smtp.outboundsmtp.com
SMTP_PORT=587
SMTP_USER=your-api-key
SMTP_TLS=required
# Or use the API
curl -X POST \
https://api.outbound.mailhop.org/v1/send \
-H "Authorization: Bearer API_KEY" \
-H "Content-Type: application/json" \
-d '{"to":"user@example.com"}'Trusted across industries
Everything you need to deliver email at scale
Dedicated IPs
Full control over your sending reputation with dedicated IP addresses. IP warming assistance and custom PTR records included.
Sub-Account Management
Manage multiple applications with separate API keys, individual usage tracking, and custom sending limits per sub-account.
Advanced Authentication
Automatic DKIM signing, SPF record management, and DMARC alignment support. Custom MAIL FROM domains for full control.
High Performance
99.9% uptime SLA with sub-second delivery times. Multi-region infrastructure ensures your emails arrive on time, every time.
Real-time Analytics
Comprehensive delivery reports, bounce handling, and event notifications. See exactly what happens to every email you send.
White-Glove Support
Direct access to delivery experts. Custom implementation assistance, proactive account monitoring, and deliverability consulting.
Built for the emails that matter most
OutboundSMTP handles the email infrastructure so your team can focus on what they do best.
Transactional Email
Order confirmations, password resets, receipts
Application Alerts
System notifications, monitoring alerts, logs
Marketing Campaigns
Newsletters, promotions, drip sequences
Tenant Migrations
Queuing during Office 365 / Google migrations
Delivery Dashboard
Last 24 hours
Security and compliance built in
Deliverability is more than good IPs
Reliable email delivery requires great infrastructure, proper authentication, inbox placement monitoring, and continuous optimization. OutboundSMTP is one piece of a complete ecosystem.
OutboundSMTP
SMTP relay with dedicated IPs, sub-accounts, and white-glove support.
AuthenticationDMARC Report
AI-powered DMARC analysis, aggregate & forensic reporting, multi-domain monitoring.
AuthenticationAutoSPF
Automatic SPF flattening so you never hit the 10-lookup limit.
Coming SoonInbox Issue
Inbox placement testing and deliverability intelligence. Know where your emails actually land.
All products by DuoCircle — email security and infrastructure since 2008.
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