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Send outbound email reliably when your app, mail server, ISP, or hosting provider limits SMTP. DNSExit SMTP Relay helps you bypass port 25 blocks, improve inbox delivery, and send from authenticated domains — starting free.
Point your mail client, server, application, or device to relay.dnsexit.com, authenticate, and start sending through DNSExit.
Just set your outgoing SMTP to relay.dnsexit.com with your relay credentials. Works with Outlook, Thunderbird, Exchange, Postfix, Sendmail, and any SMTP-capable device.
Send through authenticated SMTP with STARTTLS encryption, so credentials and message traffic are protected in transit.
No credit card required. Start sending immediately on the free plan. Upgrade to a paid tier only when your sending volume grows beyond the free limit.
Improve delivery by authorizing DNSExit in SPF and enabling DKIM signing for domains that send through your relay account.
Create unlimited relay sub-users under your account, each with their own login and sending limit. Ideal for MSPs, agencies, or resellers managing clients.
Every email sent through the relay is logged. Search by sender, recipient, date, sending IP, or domain. Click Show Delivery Status to confirm delivery instantly.
DNSExit Mail Relay is useful anywhere email needs to leave your network or application reliably.
Built for reliability, flexibility, and scale.
Based on daily email volume. Plans billed annually. Relay counters reset nightly at midnight US Eastern.
| Daily Email Volume | Price / Month |
|---|---|
| 25 relays/day | Free |
| 150 relays/day | $1.50 / month |
| 300 relays/day | $2.49 / month |
| 450 relays/day | $3.69 / month |
| 600 relays/day | $4.79 / month |
| 900 relays/day | $7.95 / month |
| 1200 relays/day | $10.95 / month |
| 1500 relays/day | $14.99 / month |
| 2000 relays/day | $19.99 / month |
| 3000 relays/day | $28.99 / month |
| 4000 relays/day | $38.99 / month |
| 5000 relays/day | $48.99 / month |
| 6000 relays/day | $58.99 / month |
| 8000 relays/day | $77.99 / month |
| 10000 relays/day | $94.00 / month |
| 12000 relays/day | $110.00 / month |
How relays are counted: One relay = one recipient. A single message to 50 recipients counts as 50 relays. 50 separate messages to one recipient each also counts as 50 relays.
Need higher volume? Contact us for a custom quote.
Extra $1.25/month per IP for IP-based relay (no authentication required).
30-day money-back guarantee on all paid plans.
Step-by-step instructions for common mail clients, servers, and SMTP gateway setups.
Mail Relay is not for bulk marketing email. It is intended for transactional, business, and application mail only. Read our Anti-Spam Policy →
The diagram below shows how outgoing SMTP is routed through DNSExit's relay infrastructure.
