Some companies use extra email firewalls (like Barracuda, Mimecast, and other Secure Email Gateways - SEGs) that make them very hard to reach.

Starting today, Instantly will automatically flag those contacts for you when you upload a list 🚀

• You’ll see SEG labels in your lead table right away. Detection includes:

  • Barracuda

  • Mimecast

  • Proofpoint

  • Cisco

• You can use SEG enrichment via API.

• Soon you’ll be able to filter contacts in SuperSearch with Waterfall Enrichment (filter by SEG/ESP), before you even add them to your campaigns.

Why it matters:
It helps you avoid sending to leads that almost never reply and can hurt your deliverability.

This is the first of several planned deliverability upgrades:
👉 Next week: Domain Send Limits → more control to protect your domains.
👉 Coming soon: Manual routing rules to decide how SEGs are handled.
👉 SuperSearch enrichment APIs: Check both SEGs and ESPs for any domain.

Together with deliverability features like filtering out “unlikely to reply” and "hostile leads", Server & IP Sharding & Rotation, Instantly is now giving you the strongest deliverability toolkit out there.

Check your Leads section — SEG detection is live and ready to use, no setup needed! 🎉