Segmenting your contacts by inbox providers—such as Gmail, Yahoo, Hotmail, and others—helps you run better-targeted campaigns, monitor deliverability issues, and improve inbox placement.
With the MX-based Segment Add-on, SendX automatically scans your contacts' email domains and groups them by their inbox provider. This gives you more control and helps you optimize engagement for each email service provider (ESP).
Before You Begin
Make sure you have the following:
An active SendX account
Access to Settings → Add-ons
MX-based Segment Add-on enabled
A populated contact list (for best results)
Step-by-Step Instructions
1. Enable the MX-based Segment Add-on
Click your profile icon in the navigation bar.
Select Settings.
Navigate to Add-ons.
Scroll to MX-based Segments.
Click on it to open the add-on details.
Toggle the switch to Enabled.
Once enabled, SendX will automatically begin classifying your contacts by inbox provider.
2. Trigger a New Scan
Click on Trigger New Scan inside the MX-based Segment add-on.
Please note that to trigger a new contact, you must scan them before segmenting.
SendX will now group all contacts by inbox providers such as:
Gmail
Yahoo
Hotmail
Outlook
Zoho
Custom domains
This ensures your segmentation data is up to date.
3. Create a Segment for Targeted Campaigns
MX-Based Segments allow you to segment your contacts based on their email provider type. Once all contacts are scanned, you can go to segments to access and use these contacts. Follow these steps to create an MX-based segment:
Navigate to the Segments page in your account
Click on "+Create Segment" to create a new segment group
Give the segment a name and click on “+ New group”
In the condition dropdown, select "MX based segments add-on" from the list of available options
In the second dropdown that appears, select "Email Provider Type (MX)"
Choose your desired email provider from the list (e.g., Gmail, Yahoo, Microsoft, iCloud, etc.)
Click "Save" to create the segment
Once all contacts are scanned and processed, the segment will be populated with contacts matching the selected email provider type
Your segment is now ready to be used for targeted campaigns, workflows and warm ups
Tips & Best Practices
Run a new scan every few weeks to ensure deliverability data stays accurate.
Use provider-specific subject lines to improve engagement (e.g., Gmail tends to clip large emails, so shorter is better).
Monitor deliverability by checking which inbox provider has lower open rates—this often indicates spam filtering issues.
A/B test campaigns across providers to identify what content performs best for each.
Conclusion
By enabling and using the MX-based Segment Add-on, you gain deeper insights into your audience and can customize your campaigns for better performance. Whether you're troubleshooting deliverability or optimizing engagement, inbox-provider segmentation helps streamline your email strategy and improve campaign outcomes.
You're all set to start sending smart, targeted campaigns!