What Is Trident Shield?
Trident Shield is your inbox gatekeeper. It maintains an allowlist of approved senders and a denylist of blocked senders. Emails from unknown senders can be held for review instead of cluttering your inbox.
The Three Lists
Allowlist (Approved): Senders whose emails always reach your inbox. Add clients, colleagues, and trusted contacts here.
Denylist (Blocked): Senders whose emails are automatically filtered out. Add spammers, persistent marketers, and unwanted contacts here.
Pending (Unknown): New senders who aren't on either list. Their emails are held for your review — you decide whether to approve or block.
How to Use Shield
Automatic Screening
When enabled, Shield automatically holds emails from unknown senders. This is especially useful for:
- Executives who receive cold outreach
- Public-facing email addresses
- Accounts that have been scraped by spammers
Security Benefits
Shield provides an extra layer of protection against:
- Phishing attempts from unknown senders
- Social engineering attacks
- Spam that bypasses traditional filters
- Unwanted cold outreach
Best Practices
- Start by adding your most important contacts to the allowlist
- Review the pending queue daily (takes 2-3 minutes)
- Block aggressively — you can always unblock later
- Use domain-level blocking for persistent spam sources (e.g., block @spammer.com)