Mailbox Warmup

New mailboxes have no sending reputation. Sending cold emails from a fresh mailbox will likely land in spam. Cleanmails includes a built-in 30-day progressive warmup system that builds reputation automatically.

How It Works

When you enable warmup mode on a sender, Cleanmails will:

1. Send realistic business emails between your warmup senders (you need at least 2 senders in warmup mode)
2. Automatically reply to warmup emails after a random delay (5-30 minutes)
3. Gradually increase volume over 30 days
4. Auto-graduate the sender after day 30

Daily Volume Schedule

Warmup Email Templates

Cleanmails uses 20 realistic business correspondence templates with spintax variations. These look like genuine professional emails — not automated warmup content that spam filters can detect.

Example subjects:

• "{Quick question|A quick question} about your Q2 plans"
• "Following up on our {conversation|discussion}"
• "Resource you might find {useful|interesting}"
• "{Congrats|Nice work} on the recent {launch|milestone}"

Enabling Warmup

From the dashboard:

1. Go to Senders
2. Click on a sender → Edit
3. Toggle Warmup Mode to ON
4. Repeat for at least one more sender (minimum 2 required)

Auto-Reply Simulation

After each warmup email is sent, Cleanmails schedules an automatic reply from the recipient sender after a random delay (configurable, default 5-30 minutes). This simulates real engagement and signals to email providers that the mailbox is receiving legitimate replies.

Monitoring Warmup Progress

Each sender shows:

• Warmup Sent — Emails sent today during warmup
• Warmup Received — Warmup emails received (replies)
• Health Score — 0-100 reputation indicator
• Warmup Start Date — When warmup began (for day calculation)

Configuration