What a dedicated SMTP server is, and what it isn't
An SMTP server is the machine that hands your email to the recipient's mail server. On a shared relay (SendGrid, Mailgun, Amazon SES and every mainstream ESP) that machine, and its IP reputation, is shared with everyone else on the platform. On a dedicated SMTP server the machine and the IP are yours.
That matters for three groups: senders whose content gets them removed from shared relays, senders whose volume gets them throttled, and senders who have been burned by someone else's spam on a shared IP and want to stop inheriting other people's reputation.
What SendHaven's dedicated SMTP server is:
- A dedicated VPS with a dedicated IPv4 address and a full, tuned MTA stack.
- Configured for your domains with SPF, 2048-bit DKIM, DMARC and ARC signing.
- Reachable over authenticated SMTP (your platform's "custom SMTP" or "delivery server" setting) or our HTTP API.
- Monitored for bounces, complaints and blacklistings, and replaced when burned.
What it isn't: a server you log into. You get SMTP and API credentials, not root. The infrastructure layer is ours, which is what lets us replace it in minutes rather than you rebuilding it over a weekend. If you need a box you administer yourself, read why a bare VPS usually burns first.