# Protect your sender reputation

> Why sending from your own authenticated domain - not a free address - protects trust and deliverability.

Source: https://www.kualo.com/knowledgebase/senders-deliverability/protect-your-sender-reputation
Updated: 2026-06-10

---

The part of an email address after the @ is the domain. Personal mail tends to use Gmail, Outlook or Yahoo; businesses use their own domain - and for email marketing, using your own domain is one of the most important things you can do for both trust and deliverability.

## Why a free address hurts you

Sending a newsletter from an @gmail.com or @yahoo.com address works against you in two ways. First, it's unconvincing - anyone can create a free address, so it does nothing to prove you're really you, which makes it harder to build trust. Second, it actively breaks delivery: providers like Yahoo and AOL treat marketing mail "from" their domain but sent through another service as impersonation, so those emails bounce or land in spam.

## Use your own domain

1. **Register a domain.** Choose one that matches your brand and website, for a consistent identity.
2. **Pick a good registrar.** Look for helpful support, WHOIS privacy to protect your details, and full control over the domain in case you move services.
3. **Authenticate it.** Set up SPF, DKIM and DMARC so providers can verify it's really you - see **[Authenticate your sending domain](/knowledgebase/senders-deliverability/authenticating-my-domain-with-spf-dkim-and-dmarc-protocols)**.
4. **Switch your sender.** With an authenticated domain you own, you can safely use it as your campaign "from" address.

## Troubleshooting

**Can't verify domain ownership** - add the DNS records exactly as given (no extra spaces), allow 24-48 hours for DNS to propagate, and use a DNS lookup tool to confirm they're visible.

**Emails bounce after switching from Gmail to your domain** - make sure SPF, DKIM and DMARC are all set, warm the new domain up with small volumes first, and check the domain isn't brand new (under 30 days).

**Authentication keeps failing** - confirm you're editing the correct DNS zone, watch for typos, and remove any conflicting or duplicate SPF or authentication records.

**Your domain provider doesn't do email hosting** - use a separate email host (Google Workspace, Microsoft 365), set up forwarding, or use a dedicated subdomain for marketing, with MX records configured for your host.

If your reputation problems continue despite all this, [open a support ticket](/knowledgebase/getting-started/how-to-create-a-support-ticket-in-mykualo).

---

_Source: Kualo Knowledgebase — https://www.kualo.com/knowledgebase/senders-deliverability/protect-your-sender-reputation · © Kualo Ltd._