Email Sending Service
Technical setup: DNS, SPF, DKIM, DMARC configuration
How Zyntro Sends Your Email
Zyntro sends email from a domain you own and control. This explains what that means, which DNS records are involved, and why the setup exists.
Choosing Your Sending Domain
The sending domain decides what your recipients see and what happens to mail addressed to it. Choose a dedicated subdomain, and understand why before ...
Set Up Your Sending Domain
Configure mail delivery for your brand: nominate a sending domain, publish the DNS records Zyntro asks for, and activate sending.
DNS Records for Email Sending
Every DNS record Zyntro asks for when you set up a sending domain, with its type, hostname, value and purpose.
Set a DMARC Policy
Publish a DMARC policy for your domain, starting with monitoring and tightening it once you can see that your mail passes.
Verify Your DNS Records
Use the DNS Verification dashboard to re-check your records, and understand why a published record is not yet a record that can send.
Your Dedicated Mailbox Address
Every configured brand gets an inbound address that routes mail into Zyntro, where FLOW can act on it.
Sending Domain Problems
Symptoms and fixes for sending domain setup and verification, from a greyed-out Continue button to mail that stopped arriving at your old mailbox.
