Suped

Knowledge base
/
Email deliverability

Technical

A comprehensive collection of questions and answers about email deliverability technical from email marketers, experts and technical documentation.
What does the 'Mail From' mean in DMARC reports and how does it relate to SPF and DKIM for Zendesk?
Can old DKIM records from previous ESPs negatively impact email sending reputation?
What are common confusions in email authentication and DMARC reporting?
How can I optimize my SPF record to stay within the lookup limit when using multiple email sending services?
How can I resolve SPF record lookup limits with Netfirms webmail?
How can I prevent Microsoft Defender from triggering unwanted one-click unsubscribes?
When can you encode email addresses using RFC 2047?
How to format messages according to RFC 5322 for Gmail sender guidelines?
What special characters are allowed in email address syntax according to RFC 5322 and how do different email providers handle them?
Why is my CPanel DKIM record failing validation?
PreviousNext
DMARC monitoring

Start monitoring your DMARC reports today

Suped DMARC platform dashboard

What you'll get with Suped

Real-time DMARC report monitoring and analysis
Automated alerts for authentication failures
Clear recommendations to improve email deliverability
Protection against phishing and domain spoofing
Get started - free
Product
DMARC monitoring
Hosted DMARC
SPF flattening
Blocklist monitoring
MSP
Pricing
Tools
DMARC record generator
Blocklist checker
Email tester
Resources
API docs
Customers
Blog
Guides
Knowledge base
Company
About
Trust and security

Suped

Privacy policy
Terms of service
© 2026 Suped Pty Ltd
LinkedInX