Zapwarm is Zapmail’s built-in email warmup. It warms your Google and Microsoft mailboxes through real browser sessions and a private network of healthy inboxes, then measures where your warmup emails actually land. You get warmup that runs on its own and a score based on real inbox placement.
Why Zapwarm?
Traditional warmup tools often have three problems:
Unreliable quality: Not all warmup activity reflects real email behavior, and open warmup networks can include unhealthy mailboxes.
No real visibility: You see a warmup score, but not whether your emails are actually reaching the inbox.
Too much manual work: You have to configure settings, manage providers, and figure out what to change when deliverability drops.
Zapwarm is built to make warmup effortless, measurable, and continuously optimized for inbox placement.
What Makes Zapwarm Different
1. Human-like warmup
Zapwarm operates your mailboxes through real browser sessions instead of SMTP or email APIs. This creates more natural mailbox activity and supports more engagement actions than just sending and replying.
2. Consistent access identity
Zapwarm accesses each mailbox from the same IP used when the mailbox was created. This keeps sign-in and mailbox activity consistent instead of changing between sessions.
3. Private, quality-controlled network
Your mailboxes warm up with a closed network of Zapmail mailboxes and 100,000 seed accounts. Mailboxes are screened before joining, continuously monitored, and restricted or removed if their health drops.
4. Warmup that matches your business
Zapwarm uses AI to understand your business from your website and creates warmup conversations relevant to it. You can also add your own copy, preferred language, and audience preferences.
5. Fully automated, with controls when you need them
Zapwarm adjusts warmup automatically based on mailbox activity. If you want more control, you can customize sending time zones and schedules, target geographies, language, email copy, and warmup volume.
6. A score backed by real inbox placement
Zapwarm uses its seed network to measure where warmup emails land across Google and Microsoft. Your Zapwarm score reflects actual inbox placement, not just how many warmup emails were exchanged.
7. Separate strategies for Google and Microsoft
Google: 21-day initial warmup
Microsoft: 35-day initial warmup
After the initial ramp, warmup continues to maintain mailbox activity.
8. Know how much you can safely send
Each mailbox gets a recommended daily campaign volume based on its sending history, warmup progress, and deliverability signals. Zapwarm warns you if you go over it.
9. Understand why deliverability changes
When inbox placement changes, Zapwarm helps identify likely causes such as campaign content, sending volume, authentication issues, or wider provider-level trends.
10. Minimal bounces
Warmup emails go only to verified, active recipients in the controlled network. They don’t use the artificial subject codes or body tags some warmup tools add.
Pricing
Mailboxes | Monthly price per mailbox |
1–30 | $2.00 |
31–100 | $1.50 |
101+ | $1.00 |
Your first month is free.
Pre-warmed mailboxes include one year of Zapwarm at no extra cost.
How to Enable Zapwarm
Step 1: Open Zapwarm
From the left sidebar, under Deliverability, click Zapwarm.
On the Zapwarm page, click Explore Zapwarm to learn more, or Go to dashboard to get started.
💡 Tip: You can also click Claim your 1 Month Free on the banner at the top of your dashboard.
Step 2: Start Warming Up Your Mailboxes
Turn on the Start Warming Up Mailboxes toggle.
On the Overview tab, you’ll see how many of your mailboxes are ready to start .
select the mailboxes can click on the next
Step 3: Tune the Warmup Schedule
Configure how your mailboxes warm up. The settings are grouped into four sections.
Volume
Daily emails: Use the slider to set how many warmup emails each mailbox sends per day.
Slow warmup: Starts with a small volume and climbs to your daily volume over 10 days. Keep this on for new mailboxes.
Weekdays only: Sends warmup emails Monday to Friday only, in the mailbox’s timezone.
Timezone: Select the mailbox timezone. Warmup emails go out between 10:00 and 17:30 in this timezone.
Content
Your company website: Enter your website. Zapmail reads it to pick your industry.
Industry (required): Select your industry. This sets the topic of your warmup conversations.
Language: Choose the language your warmup emails are written in.
Audience
Target provider: Choose who receives new warmup threads:
Balanced: A mix of Google and Microsoft recipients
Google: Google recipients only
Microsoft: Microsoft recipients only
Target geography: Select up to 5 countries. This is saved for now but doesn’t affect sending yet.
Inbox
Move warmup emails to a label: Turn this on to send received warmup emails to a single label instead of your inbox, so they don’t clutter it.
💡 Tip: Not sure what to choose? Add your website and industry, and keep the rest at the default settings. Zapwarm adjusts warmup automatically as your mailboxes’ activity changes.
Step 4: Review Cost and Start
Review your pricing before you start. Your first month is free, so nothing is due today. The summary shows:
Mailboxes: The number of mailboxes you’re warming up.
Free until: The date your free month ends.
Then: Your price per mailbox per month after the free month.
First charge: The date and amount of your first charge.
When you’re ready, click Start Free Month.
The first charge covers only the mailboxes still warming up on that day, so if you pause a mailbox before then, you won’t be charged for it.
Once you’re done, Zapwarm starts warming up your mailboxes automatically.
How to Analyse Your Warmup Performance
Open the Overview tab in Zapwarm to see how your warmup is performing. Use the date filter at the top right (for example, Last 30 days) to change the time range.
Step 1: Check Your Account Performance
The top row gives you a quick health check. Each card shows how the metric changed compared with the previous 7 days: a green ▲ means it went up, and a red ▼ means it went down.
Zapwarm score
Your overall inbox placement score for the last 14 days. This is the single best number to watch, because it reflects where your emails actually land, not just how many were sent.
A small dip of a point or two is normal day-to-day movement.
A steady drop over several days is a sign to investigate (see What to Do if Performance Drops below).
Mailboxes warming up
How many of your mailboxes are currently warming up, out of your total mailboxes. Use this to check that every mailbox you plan to use for campaigns is included.
Emails Sent
Total warmup emails sent in the selected time range. A big jump here is expected when you add new mailboxes or when Slow warmup is ramping up to your daily volume. A sudden drop may mean mailboxes were paused or stopped warming up.
Saved From Spam
Of the warmup emails that landed in spam, the percentage that were moved back to the inbox. Moving emails out of spam signals to Google and Microsoft that your emails are wanted.
Reached Inbox
The percentage of warmup emails that landed in the inbox rather than spam. This is your clearest view of inbox placement.
Step 2: Check Your Reputation
The Reputation gauge shows your live Zapwarm score with a rating such as Good or Excellent.
The color of the arc shows where your score sits, from red (low) to green (high).
The spokes around the gauge show your daily sending volume, colored by inbox rate. Green spokes are days with strong inbox placement. Spokes turning orange or red point to days with more emails landing in spam.
Step 3: Follow Where Every Email Went
The Where every email went chart follows every warmup email from sending to its final outcome. All percentages are shown as a share of total emails sent.
Sent: Total warmup emails sent.
Inbox: Emails that landed in the inbox. These split into:
Opened: Emails that were opened.
Not opened: Emails that reached the inbox but weren’t opened.
Spam: Emails that landed in spam. These split into:
Rescued to inbox: Emails moved from spam to the inbox.
Stayed in spam: Emails that stayed in spam.
What to look for: the wider the Inbox band and the thinner the Spam band, the healthier your mailboxes are. A thin Stayed in spam band means almost every email that hit spam was rescued.
Example: Reading a Healthy Dashboard
Here’s how to read a dashboard like the one above:
Metric | Value | What it means |
Zapwarm score | 99 (Excellent), ▼ 1.0 pts | Excellent placement. A 1-point dip is normal movement. |
Emails Sent | 29,947, ▲ 1034% | Volume rose sharply, likely because new mailboxes joined or are ramping up. |
Reached Inbox | 99.2%, ▼ 0.4 pts | Nearly every tracked email reached the inbox. |
Saved From Spam | 85.4% (204 of 239) | Most emails that hit spam were rescued. |
In the flow chart, 29,101 emails (97.2%) landed in the inbox, and only 239 (0.8%) landed in spam. Of those 239, 204 were rescued and just 35 stayed in spam.
Taken together, this account is healthy. The small dips in score and inbox rate are minor, especially with volume rising this quickly. Keep watching the score over the next few days to make sure it stays stable.
What to Do if Performance Drops
If your Zapwarm score or Reached Inbox rate keeps falling over several days:
Check your campaign volume: Make sure you aren’t sending more campaign emails than each mailbox’s recommended daily volume.
Check your authentication: Make sure SPF, DKIM, DMARC, and MX records are all active on your domains.
Review your campaign content: Spammy wording, too many links, or heavy images can hurt placement.
Contact support: If you can’t find the cause, our team can help at [email protected].
This shows exactly where your emails land, not just how many were exchanged.
✅ You’re All Set!
Zapwarm is now warming up your mailboxes and tracking real inbox placement. Check the Overview tab regularly to monitor your score and spot problems early.
If you need help at any point, our support team is always here.
📩 Contact Support: [email protected]