Email deliverability primarily depends on two factors:
Your sending domain configuration
Your sending practices
The decision to place an email in the inbox, spam folder, or block it entirely is made by email providers such as Gmail, Yahoo Mail, Outlook, etc.
In recent years — and especially with stricter requirements introduced by Google and Yahoo — each sending domain is evaluated individually by email providers.
This means:
Learnybox cannot guarantee email deliverability
A poor domain reputation can lead to:
Emails being delivered to spam
Lower open rates
Emails being blocked entirely
Priority checks
1. Verify your domain authentication (required)
Since February 2024, DKIM and DMARC authentication are required for sending emails to Gmail and Yahoo inboxes.
What are DKIM and DMARC used for?
These protocols do not directly improve deliverability, but they are essential for building and maintaining a reliable domain reputation over time.
⚠️ When activating them, a temporary drop in deliverability may occur, as email providers need time to reassess your sending behavior.
2. Check your DKIM configuration
Go to your Learnybox account General Settings
Ensure your domain is marked as “Validated”
You can also use a third-party tool to verify your DKIM records
(by entering your domain name and Learnybox DKIM selectors)
If your configuration is correct but issues persist, this usually indicates a domain reputation issue.
Understanding your sending domain reputation
Your domain reputation reflects the level of trust email providers assign to your domain. A domain with a poor reputation will have its emails more frequently classified as spam.
It is influenced by several factors, including:
Recipient engagement (opens, clicks, replies)
Spam complaints (emails marked as unwanted)
Bounce rate (invalid or inactive email addresses)
Sending history (volume, consistency, and progression)
What you can do to improve deliverability
Gradually warm up your domain
When a domain is new or has recently been authenticated, it is essential to gradually increase your sending volume.
This warm-up phase typically lasts 4 to 6 weeks.
Maintain a clean email list
A low-quality email list can significantly impact your deliverability.
Best practices:
Remove or re-engage contacts inactive for 6 to 12 months
Regularly clean invalid or temporary email addresses
Avoid using generic addresses (info@, contact@, etc.)
Use external tools to validate your email lists if needed
Target and engage your contacts
Personalize your emails (name, relevant content)
Segment your contacts based on their behavior
Send campaigns primarily to active contacts
Test subject lines, content, and sending frequency
Create segments of inactive contacts and manage them separately
Monitor your reputation with Google Postmaster Tools
Google Postmaster Tools is a free, web-based email deliverability monitoring tool provided by Google for high-volume senders. It helps organizations understand how Gmail evaluates their mail so they can improve inbox placement, reduce spam foldering, and maintain a healthy sender reputation.
Google Postmaster Tools allow you to monitor your domain reputation, analyze spam complaints and bounce rates, and adjust your sending strategy accordingly.
If your domain reputation is low, it is recommended to:
Reduce sending volumes
Target only engaged contacts
Gradually improve positive engagement signals
Final note
Email deliverability is not controlled by Learnybox, but by email providers.
Your results will therefore depend on your technical configuration, your sending practices, and the reputation you build over time.