Security
SPF, DKIM, DMARC, BIMI, MTA-STS, and TLS-RPT — standards, guidance, and enforcement strategy for the enterprise inbox.
Microsoft Email Rejections Explained: 550 5.7.515 Authentication Failures
Understand Microsoft’s 550 5.7.515 email rejection error starting May 5, 2025. Discover why emails are being blocked and how to resolve this issue by ensuring your domain passes DMARC, SPF, and DKIM checks with Skysnag for seamless email delivery.
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Navigating DMARC: Monitoring vs. Enforcement
Ensuring email security is essential in today’s world. Organizations worldwide face increasing threats like phishing and spoofing, emphasizing the need...
How Entrust and Skysnag Are Elevating Email Security with Automated BIMI Compliance
Skysnag’s Strategic Partnership for Comprehensive Blue Checkmark Acquisition: In a strategic move to provide customers with a comprehensive and streamlined...
How to Set Up DMARC for Office 365
Millions of organizations use Office 365 worldwide which makes it a likely target for phishing attacks. It is critical to...
What is Website Spoofing?
Have you ever visited a well-known brand’s website and felt that something wasn’t quite, right? Maybe the grammar was wrong...
What is Email Scanning?
Email scanning can only scan emails from accounts that have POP3 and SMTP enabled. With POP3 accounts, the email scanning...
How to Set Up SMTP Service for Windows Server
All versions of Windows Server come with tools that can be used to install an SMTP server. This SMTP server...
How To Setup SMTP Relay Gmail?
Without having to manage your outgoing email server, Gmail enables you to combine Google’s SMTP server settings with the web...
What is MTA-STS and how does it Improve Email Security?
Mail Transfer Agent Strict Transport Security (MTA-STS) is a security policy for SMTP servers that is specified in RFC 8461....
What is Sandboxing?
Cybercrime is becoming more strategic and deadly every day, employing advanced assault methods and hackers continually coming up with new...
Can my domain have more than one DKIM record?
You can have more than one DKIM record on your domain, unlike DMARC or SPF. As long as your DNS...
STARTTLS and SSL/TLS? Email Encryption explained
STARTTLS and SSL/TLS are standard protocols used to secure email transmissions. Due to the abbreviations’ similarities, it can become confusing...
Email Authentication: First Line of Defense against BEC
Skysnag automatically applies default authentication to your marketing emails in order to improve deliverability. In order to safeguard email senders and...
Check your domain's DMARC compliance.
Five protocols. Sixty seconds. No account. A full authentication-posture report on your domain, delivered before your coffee cools.