About DMARC GUY

Why DMARC GUY Was Created

DMARC GUY is the continuation of LastSpam, a company specializing in combating spam with over 20 years of experience.

Although DMARC has been available since 2012, many organizations either do not adopt it or implement it ineffectively.
DMARC is the critical first step in ensuring email deliverability and protecting domains from email identity spoofing.
From government agencies to media, banks, and small businesses, many domains continue to have weak or nonexistent DMARC configurations.
DMARC GUY’s mission is to bridge this gap, enhancing email security and deliverability for all.

Improved Deliverability DMARC is the essential first step to ensure your emails reach inboxes, significantly reducing the risk of rejection or being marked as spam.
Prevent Spoofing and Protect Your Reputation DMARC greatly reduces the risk of identity theft via your domain, such as fraudulent emails from addresses as [email protected]. As the most effective standard for preventing hackers and spammers from using your domain to send phishing attempts, promotional, or malicious emails, DMARC protects your brand. By significantly increasing the likelihood that only authorized emails are received or displayed, DMARC strengthens the trust that customers and email systems place in your domain, preserving your online reputation.

Invention DMARC was developed in 2011, with the specification published on January 30, 2012.
Operational It became operational for public use in 2012 after the specification was published.
Enforcement by Major Providers Major providers like Google, Yahoo, and Microsoft began variably enforcing DMARC policies around 2015, with stricter enforcement (e.g., mandatory for bulk senders) since 2024.