How to Secure Your Transactional Email Service

Transactional email systems require DKIM, SPF, and DMARC authentication to prevent spoofing, plus infrastructure controls and vendor assessment to block compromise.

Transactional email systems require DKIM, SPF, and DMARC authentication to prevent spoofing, plus infrastructure controls and vendor assessment to block compromise.

Unexpected logins, spam complaints, and broken authentication records reveal when email marketing accounts fall to attackers.

Newsletter breaches expose millions yearly. Protect subscriber data with email authentication, encryption, and strict consent records.

If your mailing list is compromised, you have 24-72 hours to stop the breach, notify regulators, and contact affected subscribers or face fines up to $1 million.

Email headers reveal who really sent the message—check SPF, DKIM, and DMARC results to catch spoofed emails.

Encrypted email protects message content from breaches but not metadata—and most providers' claims require verification beyond marketing language.

Your unsent emails may be copied across servers worldwide the second you start typing. Here's how to keep drafts actually private.

From plaintext passwords to session cookies that skip MFA, here is exactly what a webmail breach hands attackers — and why your inbox is the prize.

A silent inbox rule can keep leaking your mail long after you reset the password — here's how to shut that door for good.

Attackers use your auto-reply to validate your email address and launch targeted phishing before you return from vacation.