Warm Up Your Email Before You Start Sending
Build a stronger sending history with automated email warmup before starting your cold-email campaigns.
hello@yourcompany.com
sales@yourcompany.com
team@yourcompany.com
What is email warmup, and why does it matter?
A brand-new mailbox, or one that hasn't sent much mail recently, has little to no sending history. Inbox providers use that history to decide how much to trust an account. Warmup builds that trust gradually, by having your mailbox send and receive genuine-looking mail before you point it at real prospects.
Skip this step and a mailbox that suddenly starts sending dozens of cold emails a day can look suspicious to inbox providers — which is exactly the kind of signal that pushes mail into spam.
Why it matters
- Builds sending history before you rely on the mailbox
- Reduces the chance of a sudden spike in sending looking suspicious
- Gives you visibility into mailbox health before outreach begins
Connect the mailbox you want to warm up
Warmup works with the mailbox you already use for sending — no separate warmup-only account required.
Gmail
Google Workspace & personal accounts
Outlook
Microsoft 365 & Outlook.com
Zoho Mail
Zoho Workplace
Custom SMTP
Any provider that supports SMTP/IMAP
Turn warmup on and configure it
Once your mailbox is connected, enable warmup and choose how it should behave — how it starts, how quickly it ramps up, and how much reply activity is involved. Nepaleads handles the day-to-day sending in the background.
Warmup settings
- WarmupEnabled
- Starting volumeLow
- Daily increaseGradual
- Reply activityOn
- Active daysMon – Fri
Sending activity increases gradually
Warmup doesn't start your mailbox at full volume. It begins small and steps up over time, so your sending pattern looks like it's growing naturally rather than appearing all at once.
Getting started
Building trust
Increasing volume
Full sending volume
Real conversations, not one-way sending
Your mailbox exchanges mail with other mailboxes in a warmup network — sending, opening, and replying to messages back and forth so the activity looks like genuine correspondence, not a one-directional blast.
Warmup network activity
Recovering messages that land in spam
When a warmup email lands in the spam folder instead of the inbox, the network engages with it — opening it and marking it as not spam — which helps signal to the inbox provider that mail from your mailbox belongs in the inbox.
Spam folder
Message detected here
Inbox
Marked as not spam
See your mailbox health at a glance
As warmup runs, Nepaleads keeps a running status on your mailbox so you know when it's ready for real outreach.
Mailbox Health
Good
Deliverability
On track
Blacklist Status
Not listed
DNS Records
Configured
Deliverability checks that run alongside warmup
Warmup covers your sending history, but deliverability also depends on your domain setup and reputation. Nepaleads checks both while warmup is running.
SPF
Confirms your domain allows your mailbox to send on its behalf.
DKIM
Signs your emails so inbox providers can verify they're genuine.
DMARC
Tells inbox providers what to do with mail that fails those checks.
Blacklist monitoring
Checks your domain and mailbox against blacklist providers so you can catch a listing early.
How long should warmup run?
There's no single fixed timeline — it depends on how new the mailbox is and how its health looks. A good rule of thumb is to keep warmup running until your mailbox status and deliverability checks look healthy, then move into cold outreach while keeping a lower level of warmup active alongside it.
New mailbox
Warming up
Healthy — ready to send
Starting cold outreach from an unwarmed mailbox risks landing in spam right when it matters most. Running warmup first means your first real campaign sends from a mailbox that already has a track record.
Can you warm up a mailbox manually?
Yes — warmup is a concept, not something only software can do. Automating it just makes it consistent and hands-off.
Doing it manually
Ask colleagues or contacts to email and reply to your mailbox, and check your spam folder yourself to mark misplaced messages as not spam. It works, but keeping it up consistently takes ongoing effort.
Automatic with Nepaleads
Warmup activity, spam-folder engagement and health monitoring run continuously in the background, across as many connected mailboxes as you need.
Built around safe, responsible sending
Warmup is meant to build trust, not create risk — so it's designed to stay well within normal, expected mailbox activity.
Gradual by design
Volume increases step by step instead of jumping straight to full sending.
Stays within the warmup network
Activity happens between mailboxes in the network, not with your real prospects.
Looks like real correspondence
Opens, replies and conversations are designed to resemble genuine mail activity.
Runs alongside monitoring
Mailbox health and deliverability checks run the whole time warmup is active.
From new mailbox to ready-to-send
Here's the full path from connecting a mailbox to starting real outreach.
Connect your mailbox
Add the email account you plan to send from.
Turn on warmup
Enable warmup and let it run in the background.
Ramp up gradually
Sending activity increases step by step over time.
Build real engagement
Your mailbox exchanges genuine-looking mail with the network.
Watch mailbox health
Track status, deliverability and blacklist checks as you go.
Start cold outreach
Move on to real campaigns once your mailbox looks healthy.
Frequently asked questions
Ready to warm up your mailbox?
Connect your mailbox and start building sending history before your next cold-email campaign.