By the end of this tutorial, you’ll know how to configure Reply Rate and Internal Conversations for a mailbox in lemwarm so you can create more natural warm-up activity and better control how mailbox engagement is simulated.

This matters because realistic mailbox activity helps warm-up behavior look less predictable. By tuning reply frequency and adding internal team conversations, you can create more human-like engagement patterns on top of your normal warm-up volume.

Prerequisites

You should already have at least one mailbox connected in lemwarm.
You should already know how to access your deliverability settings.
You should already have warm-up enabled for the mailbox you want to manage.

Core lesson

Phase 1: Open the mailbox warm-up settings

Go to Deliverability, open the Settings tab, and click the edit icon for the mailbox you want to configure. This opens the mailbox settings panel, where you can adjust advanced warm-up behavior for that specific inbox.

Phase 2: Configure Reply Rate and Internal Conversations

In the mailbox side panel, open Warmup settings and locate Answer rate and Internal conversation. These two settings work together to shape how active and realistic your mailbox appears during warm-up.
Set the Reply Rate in the Answer rate field. This controls the probability that an incoming warm-up email will receive a reply instead of responding every time.
- 100% means every incoming warm-up email gets a reply.
- 50% means replies happen about half the time.
- 20% means replies happen less often, creating more variability.
This setting is useful when you want conversation patterns to feel less mechanical and more like real inbox behavior.
Set the Internal Conversations percentage in the Internal conversation field. This adds extra warm-up emails exchanged between mailboxes that belong to the same team.
These messages are generated in addition to your normal warm-up activity, including outbound warm-up emails and replies from the warm-up network. Use this when you want to simulate everyday internal communication and increase total mailbox activity naturally.

How these settings work

Reply Rate

Reply Rate lets you define the likelihood that a warm-up email will receive a response. Instead of replying to every incoming email, lemwarm uses the percentage you set to randomly decide whether a reply should be sent.

This randomness makes activity look more natural over time. Real inboxes do not answer every message consistently, so adjusting the reply rate helps avoid perfectly predictable behavior.

Internal Conversations

Internal Conversations create extra warm-up emails between mailboxes in the same team. These messages simulate internal communication that normally happens inside a company, such as quick updates or casual exchanges.

The internal conversation volume is added on top of your regular warm-up volume. That means your mailbox activity includes:

Outbound warm-up emails
Replies generated through warm-up
Additional internal team conversations

Practical application

Here are a few common ways to use these settings:

Conservative setup: Use a lower reply rate, such as 20% to 40%, if you want lighter and less frequent reply behavior.
Balanced setup: Use around 50% reply rate and a modest internal conversation percentage to create steady but varied engagement.
High-activity simulation: Use a higher reply rate and a higher internal conversation percentage if you want stronger mailbox activity during warm-up.

Example: If a mailbox receives 10 incoming warm-up emails and the reply rate is set to 50%, lemwarm will reply to roughly 5 of them over time. If internal conversations are also enabled, additional team-to-team emails will be generated beyond those replies, increasing the total activity in that mailbox.

Best practices

Adjust settings gradually instead of making extreme changes all at once.
Use Reply Rate to introduce natural variability, not perfect consistency.
Use Internal Conversations when you want mailbox activity to feel broader than standard warm-up exchanges.
Monitor total daily volume so your warm-up behavior stays aligned with your deliverability goals.

Troubleshooting and pitfalls

Issue: The mailbox is not replying as often as expected

Root cause: Reply Rate is based on probability, so replies are not guaranteed for every message unless it is set to 100%.
Fix:
- Check the current Answer rate setting.
- Increase the percentage if you want more frequent replies.
- Remember that lower percentages are designed to create variability.

Issue: Mailbox activity seems higher than expected

Root cause: Internal Conversations are added on top of your normal warm-up volume.
Fix:
- Review the Internal conversation percentage.
- Lower it if total mailbox activity is too high.
- Check the mailbox’s overall daily volume in settings.

Issue: Reply behavior feels too predictable

Root cause: The Reply Rate may be set too high, especially at 100%.
Fix:
- Reduce the Answer rate to introduce more variation.
- Use a moderate percentage such as 40% to 80% depending on your goals.
- Combine it with Internal Conversations for more diverse activity patterns.

Issue: I enabled Internal Conversations but do not see a separate setting elsewhere

Root cause: Internal Conversations are configured per mailbox inside Warmup settings.
Fix:
- Open the correct mailbox from Deliverability.
- Go to Settings and click the mailbox edit icon.
- Confirm the value in the Internal conversation field.