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Smart Warmup

Smart Warmup is CronDB's standalone email deliverability product. It warms up your sending accounts by exchanging realistic AI-generated conversations, building sender reputation, and keeping your emails out of the spam folder.

Email Warmup

How It Works​

  1. Connect your inbox — Add your Gmail, Outlook, or SMTP sending account
  2. AI generates conversations — Our DeepSeek-powered AI creates unique, human-like email exchanges with a network of real inboxes
  3. Gradual volume increase — Starts with a few emails per day and gradually ramps up over 2–4 weeks
  4. Spam rescue — Warmup emails that land in spam are automatically moved to inbox, training email providers that your messages are legitimate
  5. Reputation monitoring — Track your inbox placement rate, spam rate, and sender score in real-time

Why You Need Warmup​

  • New domains need 2–4 weeks of warmup before cold outreach
  • Inactive accounts lose reputation if not used regularly
  • High-volume senders need continuous warmup to maintain deliverability
  • After a spam incident — warmup helps rebuild trust with email providers

Getting Started​

1. Add a Sending Account​

Navigate to Outreach → Email Warmup and click Add Account.

Enter your email credentials:

  • Gmail — Use App Password (Settings → Security → 2FA → App passwords)
  • Outlook/Microsoft 365 — Use OAuth or App Password
  • Custom SMTP — Enter host, port, username, password

2. Configure Warmup Settings​

SettingDefaultDescription
Daily limit5 (ramps to 40)Maximum warmup emails per day
Ramp speedModerateHow quickly volume increases (slow/moderate/fast)
Reply rate30%Percentage of warmup emails that receive AI replies
ScheduleBusiness hoursWhen warmup emails are sent

3. Monitor Progress​

The warmup analytics dashboard shows:

  • Inbox placement rate — percentage of warmup emails landing in inbox (target: above 95%)
  • Spam rate — percentage landing in spam (target: under 2%)
  • Daily volume — Current vs. target send volume
  • Health score — Overall deliverability health (0–100)
  • Provider breakdown — Performance by email provider (Gmail, Outlook, Yahoo)

AI-Generated Emails​

Smart Warmup uses DeepSeek AI to generate unique email conversations:

  • Persona engine — Each conversation uses a different sender persona with realistic names, titles, and companies
  • Topic diversity — Emails cover business topics (meetings, project updates, follow-ups) — never spam-like content
  • Thread depth — Conversations go 2–5 replies deep for realism
  • No templates — Every email is unique; email providers can't fingerprint them as warmup
Privacy

Warmup emails are exchanged with CronDB's network of real inboxes. These emails are automatically deleted after 30 days. No customer data is used in warmup conversations.

Pricing​

Smart Warmup is a standalone add-on — it's not included in any CronDB plan.

VolumePrice
1–5 inboxes5 per inbox/month
6–20 inboxes4 per inbox/month
21+ inboxes3 per inbox/month

Volume pricing is calculated automatically based on your total connected inboxes.

Warmup Analytics​

Key Metrics​

MetricGoodWarningCritical
Inbox rateAbove 95%85–95%Under 85%
Spam rateUnder 2%2–5%Above 5%
Health score80–10060–80Under 60

What to Do If Scores Drop​

  1. Reduce sending volume — Lower your daily cold email sends temporarily
  2. Check content — Avoid spam trigger words, excessive links, or large images
  3. Verify DNS — Ensure SPF, DKIM, and DMARC records are configured correctly
  4. Increase warmup — Ramp up warmup volume to rebuild reputation
  5. Wait — Reputation changes take 3–7 days to reflect

Best Practices​

  • Start warmup 2 weeks before your first cold outreach campaign
  • Keep warmup running continuously alongside active outreach
  • Don't exceed 50 cold emails/day per inbox until fully warmed (health score >80)
  • Use a dedicated domain for outreach (don't warm up your primary company domain)
  • Set up SPF, DKIM, and DMARC records before starting warmup

Plan Compatibility​

Smart Warmup works with any CronDB plan (including Free Trial). It's billed separately from your subscription and appears as a separate line item on your invoice.

Next Steps​

Start Warmup →