SendMailAs automates the entire pipeline - DNS, email routing, SMTP relay, and authentication. Here's exactly what happens.
Someone sends to
you@domain.com
Lands in
GmailYour Gmail inbox
You reply in
Gmail
They see it from
you@domain.com
Both directions flow through your existing Gmail inbox. No new app, no separate mailbox.
No DNS expertise. No YouTube tutorials. No terminal commands.
Enter your domain name in the SendMailAs dashboard. SendMailAs creates a DNS zone on Cloudflare and configures MX records, SPF, DKIM, and DMARC automatically. No manual DNS editing required.
Add the email addresses you need - hello@, contact@, support@, or any prefix. Each address is configured to forward incoming emails to your Gmail inbox.
Copy the SMTP credentials from your SendMailAs dashboard and paste them into Gmail's 'Send mail as' settings. Click the verification link. You can now send and receive as your custom address from Gmail.
That's it. You're sending and receiving from your custom domain in Gmail.
Everything you'd normally configure by hand across Cloudflare, your registrar, and Gmail.
A Cloudflare DNS zone is provisioned for your domain with all required records.
MX records are set to route inbound email through Cloudflare to your Gmail.
All three authentication standards are configured automatically. DKIM keys are generated per domain.
Unique SMTP credentials are generated for Gmail's 'Send mail as' feature. One copy-paste into Gmail.
Inbound routing rules are created for each address, forwarding to your specified Gmail account.
SendMailAs confirms that DNS records are live, email routing is active, and SMTP relay is functional before marking setup as complete.
For those who want the technical details. Here's the exact path an email takes.
Someone sends an email to you@yourdomain.com
Your domain's MX records point to Cloudflare
Cloudflare Email Worker receives the message
The worker forwards it to your Gmail inbox via Haraka SMTP
The email appears in Gmail like any other message
You compose in Gmail and select your custom address from the 'From' dropdown
Gmail connects to SendMailAs SMTP relay using your credentials
Haraka signs the message with your domain's DKIM key (raw-byte relay)
The email is delivered to the recipient with proper SPF and DKIM alignment
The recipient sees you@yourdomain.com with no 'via' banner or third-party branding
No email content is stored on our servers. We handle routing and authentication only.
Three standards determine whether your email lands in inboxes or spam. SendMailAs configures all three automatically.
Sender Policy Framework
Tells receiving servers which IP addresses are authorized to send email for your domain.
SendMailAs adds a TXT record to your DNS that includes our sending servers. Receiving servers check this record to verify the email is legitimate.
DomainKeys Identified Mail
Adds a cryptographic signature to every email you send, proving it hasn't been tampered with.
SendMailAs generates a unique DKIM key pair for each domain. The private key signs outgoing messages via raw-byte relay on Haraka. The public key is published in your DNS for recipients to verify.
Domain-based Message Authentication
Tells receiving servers what to do when SPF or DKIM checks fail. Prevents spoofing of your domain.
SendMailAs creates a DMARC policy record in your DNS. This instructs receiving servers to reject or quarantine emails that fail authentication, protecting your domain's reputation.
No. Email content passes through our routing infrastructure and goes straight to Gmail. We store domain configuration and encrypted SMTP credentials. Nothing else.
SendMailAs uses Cloudflare for DNS management. When you add a domain, we create a DNS zone on Cloudflare and configure all the required records automatically. Your domain registrar just needs to point nameservers to Cloudflare.
Yes. When SendMailAs provisions your domain on Cloudflare, your existing DNS records (A, CNAME, TXT, etc.) are preserved. We only add the records needed for email routing and authentication.
If your domain is already on Cloudflare, SendMailAs can work with your existing zone. No nameserver changes needed - we just add the email-specific records to your existing configuration.
Because SendMailAs configures DNS directly on Cloudflare, changes take effect within seconds. You don't need to wait for traditional DNS propagation times.
Free accounts can send 50 emails/day. Pro accounts can send 500 emails/day. New accounts start with progressive limits (20/day) that increase automatically over 7 days as your sending history builds up.
SendMailAs is designed to replace Workspace for email. If you're currently on Workspace and only use it for email (not Calendar, Drive admin features, etc.), you can switch to SendMailAs and cancel Workspace. Your free Google account still gives you Calendar, Drive, and Meet.
SendMailAs is built for Gmail. The 'Send mail as' feature works in Gmail web, the Gmail iOS app, and the Gmail Android app. Third-party email clients that support SMTP can also use your SendMailAs credentials.
First domain free. Set up in 5 minutes.
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