What is a Secure Email Gateway
Many companies use extra layers of security on top of their regular email provider (ESP). These are called Secure Email Gateways (SEGs) - tools like Barracuda, Mimecast, Proofpoint, and Cisco - email firewalls.
They filter, block, or quarantine messages before they ever reach the recipient. Reaching these inboxes is far more difficult and often wastes time and hurts deliverability.
Why It Matters
By identifying SEGs early, you can:
Avoid sending to hard-to-reach leads.
Protect your domain reputation and inbox placement.
Focus campaigns on contacts most likely to open and respond.
How Instantly Helps
Instantly will automatically flag contacts protected by SEGs as soon as you upload a list.
Live in your Leads table: SEG labels appear right away.
API support: You can enrich and detect SEGs programmatically.
Filter Leads by Secure Email Gateway (SEG)
SEGs are email security systems that make it difficult to reach contacts. Filtering by SEG helps you identify these contacts and adjust your approach.
Accessing Lead Filters
In Campaigns
Navigate to your campaign
Click the "Leads" tab
Click the "Filter" button in the toolbar
Select Lead SEG from the options
In CRM
Go to CRM from the main navigation
Open a List or Campaign view
Click the "Filters" button
Select Lead SEG
Available SEG Filters
None
All ESGs
Barracuda
Mimecast
Proofpoint
Cisco
