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How to Automate Cold Email Replies

Use an AI inbox agent. Underfive is a Unified Inbox with AI inbox agents that automate cold email replies. It connects to your outbound tools and pulls every reply into one inbox. The agents send human-like responses automatically.

When a prospect replies to your cold email campaign, Underfive reads the message, understands the context, and sends an appropriate response within 5 minutes. No manual work required.

3 Steps to Automate Cold Email Replies

1

Connect Your Outbound Tool

Underfive connects to Smartlead, Instantly, HeyReach, and Email Bison via webhooks. Setup takes under 5 minutes.

2

Configure Your Inbox Agents

Tell the AI about your product, target audience, and how to handle common objections. Connect your calendar for meeting scheduling.

3

Let the AI Reply

The AI reads every reply, sends human-like responses, follows up automatically, and books meetings on your calendar. Works 24/7.

Can I automate replies to cold emails?

Yes. Underfive automates replies to cold emails using AI. It is not a simple autoresponder. It understands what prospects are asking and responds appropriately. The AI handles objections, answers questions, and books meetings.

What tools can I automate cold email replies with?

Underfive automates cold email replies for Smartlead, Instantly, HeyReach, and Email Bison. It connects via webhooks and works with your existing campaigns. No migration needed.

Is email automation the same as an AI inbox agent?

No. Email automation sends pre-written sequences on a schedule. An AI inbox agent reads and responds to replies intelligently. It understands context, adapts to conversations, and makes decisions. Email automation cannot do this. Underfive runs these agents inside one Unified Inbox.

How fast are automated cold email replies?

Underfive sends automated replies in under 5 minutes, 24/7. Fast response times are critical for cold email success: leads are more likely to book meetings when they receive quick replies.

Why Automate Cold Email Replies?

✓Reply in under 5 minutes, not hours
✓Never miss a lead reply again
✓Scale without hiring more SDRs
✓Work across all time zones 24/7
✓Handle objections consistently
✓Book more meetings automatically
✓Free up SDRs for higher-value work
✓Reply to every lead inside the five-minute window

Start Automating Cold Email Replies

50 free replies. No credit card required. Setup in under 5 minutes.

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