SendMailAs
Custom-domain email right inside Gmail — no Google Workspace needed.
Built for freelancers and small teams who want a professional [email protected] address but don't want to pay for and administer Google Workspace just to send mail.
The hard problem is twofold: let people send and receive from their domain without leaving the Gmail they already live in, and get the DNS and authentication right so that mail actually lands in the inbox instead of spam.
Build on top of Gmail instead of building another inbox.
The tempting move is to ship a slick standalone webmail. I didn't. Custom-domain email only matters if people actually use it, and the inbox they already trust is Gmail — so SendMailAs plugs into it rather than asking anyone to migrate.
The cost is real: I'm bound by Gmail's APIs and limits and can't own the whole experience. The payoff is zero learning curve and instant adoption — you compose from your domain in the exact UI you used yesterday.
Automate the deliverability nobody wants to debug.
SPF, DKIM and DMARC are where custom email usually dies — one wrong TXT record and everything silently goes to spam. SendMailAs generates and verifies the records for you, so setup is about five minutes instead of an afternoon of guessing why mail bounces.
Deliverability is where custom email quietly dies.
Sending as you@yourdomain is the easy part; landing in the inbox is not. SPF, DKIM and DMARC each have to be generated correctly and actually propagate through DNS, and a single wrong TXT record sends everything silently to spam with no error to debug. SendMailAs generates the records, places them where it can, and verifies propagation before it lets you send — so the failure mode that normally costs an afternoon of guesswork is caught up front instead of discovered in someone's spam folder.
you@yourdomain · composed in Gmail
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SendMailAs relay
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signed · SPF + DKIM + DMARC
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recipient inbox · authenticated, not spamYou stay inside Gmail; DNS records are auto-generated and verified before your first send.
- Inside Gmail
Send and receive as you@yourdomain straight from Gmail's compose window — no new app to learn.
- 5-minute setup
Guided DNS with SPF/DKIM generated and verified automatically.
- Lands in the inbox
Properly authenticated mail that stays out of the spam folder.
- Free to start
First domain is permanently free, no card; Pro unlocks unlimited domains and addresses.
The product removes the two reasons people avoid custom-domain email entirely: the Google Workspace bill and the deliverability headache. You keep Gmail, you keep your domain, and mail just works.