Custom Domain Configuration
Send replies from your own domain with DKIM/SPF authentication.
Connecting a custom domain lets Ticket0 send replies from support@yourcompany.com (or any address on your domain) with DKIM/SPF authentication, so customers see your brand in the From header and replies land in the inbox instead of spam.
Custom domain controls outbound only — the address replies are sent from. Inbound mail (receiving tickets) works by forwarding from your existing mailbox, regardless of whether you've connected a custom domain. See Connecting your email domain for the full flow.
Prerequisites
- A domain you control with access to DNS records
- A Ticket0 workspace (any plan — the 14-day trial is fine for setup)
You do not need a Resend account — Ticket0 handles the sending infrastructure.
Step 1 — Add the domain in Ticket0
- Go to Settings → Domains → Add domain
- Enter your domain (e.g.
yourcompany.com) - Ticket0 generates the DNS records you need
Step 2 — Add the DNS records
Copy each record from Settings → Domains → [your domain] → DNS records into your DNS provider. You'll typically have:
- SPF (TXT) — authorises the sending service
- DKIM (TXT) — unique per domain, signs outbound mail
- Return-path / MAIL FROM (MX, if shown) — for bounce handling
See SPF and DKIM verification for record-by-record guidance and common troubleshooting.
Step 3 — Verify
Once DNS has propagated (usually 5–30 minutes, up to 48 hours in edge cases), return to Settings → Domains → [your domain] and click Check status. Ticket0 queries DNS directly and marks each record as Verified.
Step 4 — Choose the From address
After verification, Ticket0 can send outbound replies from any address on the domain. By default it uses the address you enter during setup (e.g. support@yourcompany.com). You can change this in the domain's settings at any time.
Step 5 — Test
Reply to any ticket from inside Ticket0. The customer will receive the reply with your domain in the From header, and their inbox provider will mark it as SPF/DKIM-authenticated (check "Show original" in Gmail to confirm).
Using multiple addresses on the same domain
One verified domain can send from multiple addresses — e.g. support@, billing@, and sales@ — without re-verifying. Configure recipient routing in Settings → Aliases so incoming tickets land in the right place. See Multi-alias email.