DMARC Alignment Explained: Why Authentication Alone Is Not Enough
Passing SPF and DKIM is not enough for DMARC. Learn what identifier alignment means, the difference between relaxed and strict modes, and why forwarding breaks SPF alignment but preserves DKIM alignment.
How to Audit Your Email Infrastructure for Security Weaknesses
Your MX records are public. Your SMTP banner reveals your software. Your TLS config may be outdated. Here is a step-by-step security audit of your email infrastructure using free tools - and how to fix what you find.
What Is Two-Factor Authentication and Why You Need It
Passwords alone are not enough to protect your accounts. Two-factor authentication adds a critical second layer of security - but not all 2FA methods are created equal. Learn how TOTP apps, hardware keys, and backup codes work, and why your email security is the foundation of it all.
Someone Signed Up for Services Using My Email Address - What to Do
Getting emails for accounts you never created? Here is why strangers use your email to sign up, how to stop it, and how to protect yourself.
Email Encryption Explained: TLS vs PGP vs S/MIME
Three encryption technologies, three different problems solved. TLS encrypts the connection. PGP encrypts the message. S/MIME does both with certificates. Here is when you need which.
Why We Created Shield: Your Inbox Should Respect Your Schedule
You should decide when email arrives, how much of it, and from whom. Shield gives every alias its own rate limiter, delivery schedule, and sender approval list.
Anatomy of a Sextortion Email: How These Scams Work and Why They Keep Coming
Sextortion emails are one of the most psychologically manipulative scams in circulation. They claim to have webcam footage, include your real password as proof, and demand Bitcoin. Here is exactly how they work, why they include real credentials, and why you should never pay.
Does a VPN Protect Your Email? What It Covers and What It Misses
Short answer: a VPN hides your IP but does not protect email content, stop spam, or block phishing. Here is what actually keeps your inbox safe.
Invoice Fraud: How Scammers Forge Emails to Steal Payments
Invoice fraud is a form of business email compromise that costs organizations billions each year. Attackers intercept real email threads, modify bank details on legitimate invoices, and redirect payments to accounts they control. Here is how these attacks work and how to stop them.
Rspamd Spam Symbols Explained: What Your Spam Report Is Telling You
Rspamd symbols decoded - BAYES_SPAM, DMARC_POLICY_REJECT, ZERO_FONT and 12 more. What each one means, why it triggered, and how to act on it.
Email Account Compromises: How They Happen and How to Prevent Them
Compromised email accounts are surging. How attackers get in, the warning signs, and the two things that stop almost all of them.
What Is TLS in Email and How Does It Protect Your Messages
TLS is the encryption standard that protects your emails in transit. Learn how TLS works in email, what STARTTLS does, the difference between opportunistic and enforced TLS, and what TLS does not protect.
