Deliverability
Monitor sender reputation and manage your blacklist.
The Deliverability page monitors your sender reputation so your outreach keeps landing in inboxes, not spam folders. It has two tabs: Overview and Blacklist.
Health Overview
The overview shows a health verdict for your sending at a glance, backed by 30-day stats:
- Total sent — emails delivered across your connected accounts
- Bounce rate — with a target threshold, so you know when to slow down
- Reply rate — a healthy reply rate is the best deliverability signal there is
- Unsubscribe rate
Each connected email account is listed with its own send count, bounce count, daily usage against its send limit, and warm-up status.
Email Authentication
The overview also checks the three DNS records that tell Gmail, Outlook, and other providers your mail is legitimate. Missing records are the single most common reason cold email lands in spam, so each sending domain shows a pass / action-needed status for:
| Record | What it proves |
|---|---|
| SPF | Which servers are allowed to send mail for your domain |
| DKIM | That your messages were cryptographically signed and weren't tampered with |
| DMARC | How providers should handle mail that fails the checks above |
When a record is missing, Starlight links straight to the setup guide for your provider (Google Workspace or Microsoft 365). Personal mailboxes like @gmail.com and @outlook.com are shown as provider-managed — their authentication is handled for you, so there's nothing to configure.
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Automatic Protection
- Daily bounce scans — Starlight scans for bounces automatically every day; bounced addresses are blacklisted and removed from your contacts
- Send-time email verification — invalid and disposable mailboxes are caught before sending so they never hit your bounce rate
- Paced sending — sends are spread out within business hours in each recipient's timezone, with per-account daily limits
Blacklist
The blacklist prevents Starlight from ever sending outreach to specific email addresses. Emails are added for three reasons:
| Reason | Description |
|---|---|
| Bounce | The email address doesn't exist or the delivery failed |
| Complaint | The recipient reported your message as spam |
| Unsubscribe | The recipient manually unsubscribed from your outreach |
Bounces and complaints are added automatically when detected. Unsubscribes happen when a recipient clicks the unsubscribe link in your emails.
Adding Emails Manually
You can manually blacklist addresses you never want to contact — competitors, existing customers, anyone who asked:
1. Go to Deliverability → Blacklist
2. Enter the email address
3. Click Add
Searching and Removing
Use the search box to check whether an address or domain is already blocked. Click the remove icon next to any entry to make it eligible for outreach again.
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