Email warmup strategies for new domains

Oliver James

Oliver James

Beginner
Hi everyone,

We just registered a new sending domain e.g mail.mydomain.com
Main website is mydomain.com, but we want to use the subdomain for email campaigns via Mumara Campaigns and system emails via MumaraONE.

My question is:

What’s the best warmup strategy for a brand-new domain?
Our list is clean opt-in, but I don’t want to damage reputation on day one.

Would love real-world advice.
 
Great move by using a subdomain in this. That’s already step one done correctly.

To elaborate further on this
Even with clean data, new domains must be warmed up gradually.

Mailbox providers (Gmail, Outlook, Yahoo) don’t trust:
  • brand-new domains
  • sudden volume spikes
  • inconsistent sending patterns
They need to see stable behavior in order to start building trust and stabilizing the reputation.
 
Here’s a realistic warmup plan that works well with Mumara Campaigns

Phase 1: DNS + Authentication First
Before sending even 1 email:

For mail.mydomain.com, make sure:
  • SPF is correctly configured
  • DKIM is signing properly
  • DMARC policy is set (start with p=none)
  • rDNS matches the sending IP
Example:
SPF: v=spf1 ip4:162.221.150.25 include:_spf.mydomain.com ~all
DKIM: default._domainkey.mail.mydomain.com
DMARC: v=DMARC1; p=none; rua=mailto:[email protected]
Click to expand...
Never start warming before authentication is 100% verified.
 
Here’s a safe ramp-up example

Sample 14-Day Warmup Plan
Assuming total list = 80k clean opt-in

Day 1–2
Send 1,000 per day
Only to most engaged users (opened in last 30 days)

Day 3–4
Increase to 2,500 per day

Day 5–6
5,000 per day

Day 7–9
10,000 per day

Day 10–14
Gradually scale to full volume

Consistency matters more than speed.
 
Adding my experience here.

We launched notify.mydomain.com recently. Skipped warmup and pushed 40k on day one.

Results were devastating:
  • Gmail throttled
  • Outlook temp blocked
  • Took 3 weeks to stabilize
So what I have learned is now we always warm domains properly in Mumara.
 
Excellent question. Yes, ideally separate:
  • Transactional domain → e.g. system.mydomain.com
  • Marketing domain → e.g. mail.mydomain.com
In MumaraONE, transactional emails should:
  • Stay consistent volume
  • Avoid promotional content
  • Maintain low complaint rate
Mixing heavy marketing and transactional traffic on same new domain is risky.
 
If you’re on:
  • Dedicated IP → Warm both IP and domain
  • Shared pool → Focus mainly on domain reputation
Mumara handles SMTP stability properly, but mailbox providers still evaluate:
  • IP reputation
  • Domain reputation
  • Engagement signals
You can’t skip behavioral reputation.
 
We also did something smart:

For a new domain e.g platform.mydomain.com
We first sent:
  • Plain-text campaigns
  • No heavy images
  • No aggressive CTAs
Engagement was strong. Then we gradually introduced designed campaigns.

This made Gmail trust the domain faster.
 
Exactly thats correct

Warmup success depends on:

✔ Volume control
✔ Engagement rate
✔ Complaint control
✔ Consistency
✔ Content quality

Mumara gives you:
  • Segmentation tools
  • Throttling options
  • Scheduling flexibility
  • Detailed reporting
But warmup discipline must come from sender strategy.
 
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