One NS record takes the whole authentication stack off your plate — and if you happen to run on Heroku, it's a one-command add-on.
Sponsored Content
You've built the app. Now it needs to email people: password resets, receipts, the occasional "your order shipped." That's the moment developers usually discover transactional email's ugly secret—getting mail into an inbox depends on SPF, DKIM, and DMARC records that have nothing to do with your product and everything to do with whether Gmail trusts you. Mailer To Go, a transactional email service that Crazy Ant Labs launched in 2019, exists to make that part disappear.
One NS Record, and You're Out of the DNS Business
Here's how it actually removes the grind. Instead of copying authentication records into your registrar and hoping none of them are wrong, Mailer To Go's delegated setup has you publish a single NS record pointing at their service. From there, they publish and automatically rotate your SPF, DKIM, and DMARC records for you. That's the whole trade: one DNS record for the entire authentication stack, kept current even through key rotations you'd otherwise have to track yourself.
Every plan includes at least five authenticated sending domains, scaling up to unlimited on higher tiers, so the same delegated setup covers a single side project or every subdomain a growing product spins up without you re-doing the DNS dance for each one.
That authentication work isn't cosmetic. Mailer To Go cryptographically signs every outgoing message with DKIM, runs endpoints in multiple regions, and backs the service with a 99.9% uptime SLA. For an app that emails customers automatically, at odd hours and without anyone watching, that's the difference between a password reset that arrives and one that sits unseen in a spam folder.
Already on Heroku? It's One Command
If your app already runs on Heroku, the setup gets shorter still. Mailer To Go is a first-class add-on there: run one CLI command and it provisions itself inside your existing app, checking for DNS changes every few minutes so updates on your end show up without a support ticket. For a small team that would rather ship features than manage mail servers, that keeps the whole integration at one command and a single DNS record.
Your Mailer Keeps Working
Once your domain is authenticated, sending itself is unglamorous by design. Mailer To Go speaks standard SMTP on the usual ports, which means it works with whatever mailer your framework already has built in: Rails ActionMailer, Django, Laravel, Node's Nodemailer, Go's net/smtp. You don't rewrite your app to fit a new API. You swap in new SMTP credentials and keep shipping.
Plans start at $15 a month for 25,000 emails, with pay-as-you-go pricing past that, and a free tier if you want to try the full setup before committing to anything. The real cost here is time: hours spent hand-editing DNS records, or minutes spent publishing one NS record and getting back to the product you meant to build. If that sounds like your Tuesday afternoon, start on the free tier and get back to work.
Learn more at Mailer To Go.