For e-commerce stores

A store’s email has two personalities, and they fail in opposite ways. There’s machine mail — order confirmations, shipping notices, password resets — where the sin is quiet: a receipt lands in spam, and the customer assumes the order didn’t happen. And there’s human mail — the “where is my package” reply, the exchange request, the pre-sale question — where the sin is loud and public, because that same customer is about to review you.

Both run on the same plumbing: your domain, your DNS records, your sending reputation. SuperMailOS manages that plumbing for you, and prices it so the long tail of store addresses costs nothing.

Every function gets an address, none of them cost extra

Stores accumulate addresses fast: orders@, support@, returns@, wholesale@, press@, legal@, and a jobs@ you set up once for a hiring push. Under per-address pricing that list is a tax on being organized. Under SuperMailOS it’s free — aliases are unlimited, because you pay for people, not addresses.

So give every function its address, point them at the humans who handle them, and reassign when the team changes. The address a customer saved from their last order keeps working no matter who answers it this season.

Deliverability where it hurts most

Order confirmation mail is the most important email most stores send and the least watched. SPF, DKIM, and DMARC generated and published for your domain, managed IP reputation, handled warmup, and a live deliverability dashboard mean you can check that transactional and human mail alike are landing — instead of discovering the problem through a spike in “did my order go through?” tickets.

The same records protect the brand side. Spoofed “invoices” from lookalike addresses are a real problem for stores; DMARC done properly is the defense, and it’s part of the setup, not a project.

One inbox across the whole operation

Running more than one storefront or a shop plus its content site? Every domain lives in one inbox on one bill, with a Gmail-like, threaded webmail your seasonal staff can use without training, plus IMAP and SMTP for anyone who lives in a desktop client. Setup for a domain is under five minutes — one-click if your DNS is on Cloudflare or DigitalOcean, guided copy-paste otherwise.

Pricing is per person: Pro at $4 per mailbox per month ($3 billed annually) covers up to 3 domains, and Business at $6/$5 makes domains unlimited for stores with a growing brand family.

What it looks like in practice

• Launch day: orders@ and support@ exist before the first sale, at zero marginal cost.
• Peak season: seasonal staff get real mailboxes; the aliases they share never change.
• A receipt goes missing: the deliverability dashboard shows placement per domain before customers show you.
• Second storefront: new domain, same inbox, five minutes, one bill.

Check where your store’s domain stands today with the free deliverability checker — if the records aren’t right, that’s fixable in one afternoon. The 14-day trial needs no card. For why store mail specifically lands in spam, the guide is here.