Why multi-domain campaigns are complex
Email marketing success depends heavily on sender reputation, list quality, and personalization — all of which become harder to manage when you're dealing with multiple domains.
Here’s what makes multi-domain management complex:
Sender reputation is domain-specific: Poor engagement or high bounce rates from one domain can’t be “covered up” by success in another.
Audience behavior varies: Subscribers tied to different brands or regions respond differently. You need segmented content and messaging.
Deliverability risks increase: Sending too much, too fast from a cold domain — or mixing lists — can get you flagged as spam.
Performance metrics must be isolated: Without domain-level visibility, you can’t diagnose deliverability or engagement issues accurately.
Brand consistency matters: Each domain often represents a unique brand voice, identity, or market — which should reflect in every email.
How to manage email marketing for multiple domains
You can use Mailmodo to manage multiple domains efficiently. It provides all the building blocks to set up campaigns per domain and maintain deliverability and brand integrity.
Here’s how to implement this setup effectively using Mailmodo’s native features.
1. Set up multiple sender domains and multiple sender IDs
Mailmodo allows you to set up multiple sender domains. Under each domain, you can configure multiple sender IDs. This ensures that each brand or business unit sends emails from its own verified domain and specific sender, helping maintain deliverability and consistent brand identity.
How to do it in Mailmodo:
Log in to your Mailmodo account.
Go to the Settings page.
Under the Sender Domains section, click Add Sender.
Complete the setup for each domain. Verify domain ownership via DNS records (SPF, DKIM, and DMARC)
Under each domain, create sender IDs (From Name + Email Address) that represent the brand or department
2. Warm up each sender domain independently
New or unused domains need to build their sender reputation gradually to avoid spam filters and ensure inbox placement. You can use Mailmodo’s automated warm-up feature to manage this for individual domains.
To set this up
Create a bulk campaign in Mailmodo.
Select the option to send in batches at regular intervals over several days.
Define the specific days of the week and time windows for sending.
Use the increment factor to gradually grow batch sizes over time (for example, 1.5× every 24 hours).
Preview the campaign and enable it to start the warm-up process.
3. Create domain-specific contact segments
Your contacts should be grouped according to the domain or brand they’re associated with. This allows you to personalize content, track engagement per brand, and avoid cross-domain contamination that could hurt sender reputation.
To create segments in Mailmodo:
Go to Contacts and select Create a Segment.
Select Build with AI.
Define your segment criteria, such as brand, engagement level, or region.
Mailmodo will automatically generate a precise segment for you.
When saving your segments, use clear and consistent naming conventions that reflect the domain or brand. For example, a segment of engaged users for Brand A could be named “Brand A – Engaged Users,” while a list of inactive subscribers for Brand B might be “Brand B – Inactive Users”.
4. Schedule campaigns for individual domains
Managing multiple campaigns across domains can be complex. Mailmodo lets you automate campaigns per domain, choosing the right sender ID, contact segment, and schedule to match your audience’s behavior.
How to do it in Mailmodo:
Create or duplicate email templates for each brand or domain.
Choose the correct sender ID for the campaign.
Select the matching contact segment.
Schedule the campaign at optimal times based on your audience’s behavior or time zone.
5. Monitor campaign performance by domain
Tracking campaign performance per domain is crucial for spotting deliverability issues and optimizing content strategy. Mailmodo’s leaderboard makes it easy to isolate and analyze campaigns sent from each domain.
How to do it in Mailmodo:
Go to the Campaign Leaderboard
Use filters to sort campaigns by sender domain
Review open rates, click rates, bounce rates, and spam complaints per domain
This visibility helps you maintain sender reputation and double down on what’s working for each brand or business line.
Conclusion
Managing email marketing across multiple domains is about building the right structure for consistent deliverability, brand integrity, and campaign performance.
With Mailmodo, you can confidently send from multiple domains, each with its own identity and strategy, without juggling multiple platforms. Start by setting up your sender domains and contact segments to scale efficiently and maintain control as your brands grow.
