Who This Is For / When to Use
This article is for Kyrios users sending emails through broadcasts, workflows, or 1:1 conversations who want to improve inbox placement, protect domain reputation, and reduce spam filtering.
Use this guide when:
Emails are landing in spam or promotions folders
You are setting up a new sending domain
You are warming up email infrastructure
You are sending bulk or automated email campaigns
What Email Deliverability Means in Kyrios
Email deliverability refers to how mailbox providers (Gmail, Outlook, Yahoo, etc.) evaluate and accept emails sent from your Kyrios-connected domain.
Deliverability is influenced by:
Domain authentication (SPF, DKIM, DMARC)
Sending behavior and consistency
Engagement from recipients
Content quality and compliance
Kyrios provides the sending tools, but deliverability depends on correct domain setup and responsible sending practices.
Step 1: Set Up SPF, DKIM, and DMARC Records
Email authentication proves that Kyrios (or your connected email provider) is authorized to send email on your behalf.
Required Authentication
All senders: SPF or DKIM
Bulk senders: SPF and DKIM and DMARC
SPF (Sender Policy Framework)
SPF specifies which mail servers are allowed to send email for your domain.
How to get it
Log into your email service provider (Mailgun, SendGrid, Google Workspace, etc.)
Navigate to Domain Settings or Email Authentication
Copy the SPF TXT record provided
How to add it
Log into your domain host (GoDaddy, Cloudflare, Namecheap, etc.)
Open DNS settings
Add a TXT record with the provided SPF value
DKIM (DomainKeys Identified Mail)
DKIM adds a digital signature to verify that email content has not been altered.
How to get it
In your email service provider, locate DKIM settings
Copy the DKIM TXT record or key
How to add it
Add the DKIM value as a TXT record in your domain’s DNS
Save and allow DNS to propagate
DMARC (Domain-based Message Authentication, Reporting & Conformance)
DMARC tells mailbox providers what to do if SPF or DKIM fails.
Recommended policy
p=none(monitoring mode)
How to get it
Use your email provider’s documentation or DMARC generator
Specify reporting and policy settings
How to add it
Add the DMARC value as a TXT record in DNS
DMARC should be enabled only after SPF and DKIM are confirmed working.
Step 2: Verify Your Domain in Kyrios
Domain verification confirms Kyrios can safely send email using your domain.
How to verify
Ensure SPF, DKIM, and DMARC records exist in DNS
In Kyrios, go to Settings
Navigate to Email Services
Open Dedicated Domain
Verify the domain records
Verification ensures Kyrios can send authenticated email and improves inbox trust.
Step 3: Enable One-Click Unsubscribe
Mailbox providers expect a visible, functional unsubscribe option.
Why this matters
Reduces spam complaints
Improves sender reputation
Required for bulk email compliance
How it works in Kyrios
Kyrios includes built-in unsubscribe links in email templates
Ensure unsubscribe links are not removed or hidden
Step 4: Maintain an Engaged Email List
Mailbox providers track how recipients interact with your emails.
Best practices
Remove inactive subscribers regularly
Avoid sending to purchased or scraped lists
Send content that matches subscriber expectations
Low engagement signals spam behavior—even if authentication is correct.
Step 5: Monitor Email Performance
Tracking deliverability metrics helps identify issues early.
Recommended tools
Google Postmaster Tools
Microsoft SNDS (for Outlook/Hotmail)
What to monitor
Domain reputation
Spam complaint rate
Delivery errors and bounces
Engagement trends
Adjust sending volume, content, or frequency based on performance data.
Key Factors That Influence Deliverability
Safety
Mailbox providers scan emails for malicious links, phishing patterns, and unsafe content.
Relevance
Emails should be expected, useful, and personalized where possible.
Consistency
Avoid sudden spikes in volume
Use stable sending patterns
Keep domains active and recognizable
Volume
Grow lists gradually. Large volume jumps can trigger filtering.
Frequency
Send at least once per month to maintain reputation
Avoid over-sending
Allow subscribers to choose frequency when possible
Content Best Practices
Avoid Spam Triggers
Do not use misleading subject lines
Avoid excessive urgency or promotional language
Avoid Link Shorteners
Use full URLs or descriptive hyperlinks
Link shorteners are commonly associated with spam and phishing
Balance Text and Images
Ensure emails are readable even without images
Avoid image-only emails
Encourage Engagement
Ask questions
Invite replies
Use conversational language
Pro Tips
Use a dedicated subdomain (e.g.,
mail.yourdomain.com) for email sendingWarm up new domains gradually
Test emails before sending large campaigns
Stay compliant with email regulations and mailbox provider policies
Common Issues and Fixes
Emails Are Going to Spam
Fix
Recheck SPF, DKIM, and DMARC
Reduce sending volume temporarily
Improve content quality and engagement
Domain Not Verifying
Fix
Confirm DNS records are TXT records
Wait for DNS propagation (up to 48 hours)
Ensure no duplicate or conflicting records exist
High Unsubscribe or Complaint Rates
Fix
Reduce frequency
Improve list targeting
Make unsubscribe clearly visible
FAQs
What are SPF, DKIM, and DMARC?
They are email authentication protocols that prove your emails are legitimate and protect your domain from abuse.
How do I verify my domain for email sending?
Domain verification is completed by adding DNS records provided by your email service provider and confirming them inside Kyrios under Settings > Email Services > Dedicated Domain.
Why is one-click unsubscribe important?
It reduces spam complaints, improves deliverability, and is required by most mailbox providers for bulk sending.
How often should I clean my email list?
Every 3–6 months to remove inactive or unengaged contacts.
How does sending frequency affect deliverability?
Sudden increases or excessive frequency can trigger spam filters. Consistent, predictable sending builds trust with mailbox providers.
Why are link shorteners discouraged?
They are frequently used by spammers to hide malicious links, making emails more likely to be filtered.