Mailexs exists because email marketing got expensive for the wrong reasons — you were being charged for storing contacts you already own.
Mailexs is an email sending platform built and operated by Synthfy LLC. We started it after running marketing for our own brands and watching the bills climb — not because we were sending more email, but because our lists were growing. We were paying rent on our own audience.
Give every business and agency a professional-grade email platform they truly own: send from your own domains, keep your contacts in your own database, and pay only for what you actually send. No per-contact tax, no lock-in, no holding your audience hostage.
Most email tools price by contact count and keep your list on their servers. Mailexs flips that. You authenticate your own domains, your data stays yours, and pricing is tied to the one thing that has a real cost — sending. The result is the same inbox placement the big platforms get, at a fraction of the price.
An email that lands in spam is worth nothing. So we build for the inbox first: proper SPF, DKIM and DMARC on every sending domain, gradual warm-up, automatic bounce and complaint handling, and suppression lists that protect your reputation. The unglamorous engineering that keeps your mail where people can see it.
Run every brand you own from one account, each with its own isolated sending reputation.
White-label everything and send on behalf of your clients under their own domains.
Start free, grow on flat predictable pricing, and never get punished for a bigger list.
Your list is your business. We just help you reach it — reliably, affordably, and on your terms.