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Vadim Ivanov

Founder of Relaymetry, a free SPF/DKIM/DMARC/MTA-STS checker. I write about email authentication and deliverability: what actually breaks in the wild, and how to fix it

Joined Joined on  Email address vadim@relaymetry.com Personal website https://relaymetry.com

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Founder at Relaymetry

How to read a DMARC aggregate report without losing your mind
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How to read a DMARC aggregate report without losing your mind

#dmarc #email #dns #security
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4 min read

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Your email passes SPF and DKIM but still fails DMARC. Here's why
vadimivanov profile

Your email passes SPF and DKIM but still fails DMARC. Here's why

#email #security #dns #webdev
1
Comments
4 min read
97.8% of the top 10,000 domains have no MTA-STS. Here's how to be in the other 2%
vadimivanov profile

97.8% of the top 10,000 domains have no MTA-STS. Here's how to be in the other 2%

#security #email #dns #devops
Comments
4 min read
SPF's 10-lookup limit: why your SPF silently fails, and how to fix it
vadimivanov profile

SPF's 10-lookup limit: why your SPF silently fails, and how to fix it

#email #dns #security #webdev
Comments
4 min read
How to safely move your DMARC policy from p=none to p=reject
vadimivanov profile

How to safely move your DMARC policy from p=none to p=reject

#email #dns #dmarc #security
Comments 2
4 min read
What 10,000 domains actually publish for email authentication in 2026
vadimivanov profile

What 10,000 domains actually publish for email authentication in 2026

#security #dns #email #devops
1
Comments 2
4 min read
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