Mailbuoy is the SMTP relay we built for our own clients. Authenticated sending, DKIM, DMARC and a sender reputation we look after — so your invoices, password resets and booking confirmations actually land in the inbox. Hosted in AWS Sydney, supported by Starboard.
Point your app, your CRM, your printer, your line-of-business software at our SMTP endpoint. We handle the deliverability, reputation, authentication and monitoring — you get an inbox-bound email every time.
SMTP with SPF, DKIM and DMARC configured properly the first time. Your domain stays clean. Microsoft and Google both see a sender they trust.
Bounce and complaint rates monitored 24/7. If something goes sideways — a compromised app, a leaked credential — Mailbuoy pauses your sending automatically before your reputation takes a hit.
Your mail flows through AWS Sydney (ap-southeast-2), not via Singapore or the US. Your customer email addresses stay onshore — useful for healthcare, legal and government-adjacent work.
Most onboardings take less than a business day. Bring your domain, we'll handle the rest.
Tell us your sending domain and roughly how much mail you send. We'll confirm Mailbuoy is the right fit.
We send you three DNS records — DKIM, MAIL FROM and DMARC. You add them (or we add them for you).
You get a host, port, username and password. Drop them into your app, CRM or LOB software in place of the old SMTP details.
Mail flows. We watch reputation and bounces in the background. You get a monthly summary.
For years we resold SMTP relay services to our managed clients. The providers were fine — until they weren't. Pricing changed, support evaporated, deliverability dipped. So we built our own, running on the same AWS infrastructure we already trust for the rest of our managed stack.
Mailbuoy is the same relay we use ourselves. Same reputation, same monitoring, same Sydney region. The difference is the price — flat A$5/mo + GST, no per-message charges, no surprise tier upgrades, no "starter / pro / enterprise" tax.
No per-message billing, no add-on fees for DKIM or "advanced" features. Just one flat monthly price per sending domain.
Per sending domain. Cancel any time, 30 days written notice.
Mailbuoy is built for normal transactional sending. Heavy marketing senders (50k+ emails/month) get a quick chat about a custom plan — usually still cheaper than the big-name SaaS relays.
If you'd rather hand it off, we can handle the DNS, the integration with your app or CRM, and the cutover from your current provider. Included for Starboard managed clients.
Mailbuoy is for transactional and legitimate business email — receipts, confirmations, password resets, internal notifications, properly-consented marketing to your own customer list. It isn't a cold-outreach platform, a bulk newsletter blast tool, or a way around someone else's spam filters. We monitor for that and we'll pause accounts that drift. Keeps the reputation clean for everyone.
Drop us a note with your sending domain and we'll have you on Mailbuoy in a day.
