Should You Change Your Email After a Data Breach?
The honest answer is usually no. Why a new address does not un-leak the old one, what actually protects you, and the two exceptions.
Areas of Focus
Email InfrastructureSMTP & MTA ArchitectureSPF, DKIM, DMARC & SRSEmail Privacy & SecurityCredential Stuffing PreventionSoftware Engineering
Articles by Ahsan Luqman
270 articles
200,000 DTU Records Exposed in Identity System Breach (2026)
DTU confirmed attackers used stolen credentials to enter its DTUBasen identity system. Up to 200,000 users: CPR numbers, names, work emails exposed.
Gmail Plus Addressing: Why the + Trick Stops Working
Plus addressing is a filing trick, not privacy: some sites reject the plus sign, the tag strips off in one line, and your real address shows through.
Hana Bank Breach: 89 Customers' Emails, Phone Numbers Leaked (2026)
Hana Bank confirmed hackers accessed its ODS support system, exposing 89 customers' emails, phones and national ID numbers. Transaction data was not taken.
Is It Safe to Give Your Email Address to Websites?
No. The address lands in databases that leak, feeds the data-broker trade, and becomes the delivery address for spam and targeted phishing.
Welcome Savings Bank Breach: Up to 2,200 Corporate Contact Records Leaked (2026)
Welcome Savings Bank found evidence of a leak during a security review on 3 October. Up to 2,200 corporate contact records, and the fraud they enable.
Why You Are Suddenly Getting So Much Spam Email
A sudden spam spike is a symptom, not bad luck. The three usual causes, how to tell which one moved your address, and the one-glance fix for next time.
DIVD Data Breach: What DIVD Says an AI Agent Stole, and What to Do
DIVD's volunteers hunt vulnerabilities for a living. DIVD says an AI agent stole their email addresses. Hand out addresses you can trace and kill.
Fakturownia Data Breach: Invoices and Emails Stolen
Fakturownia's database was copied: invoice data, bank details, reported email addresses. The real risk is invoice fraud that looks exactly like your supplier.
How to Use Email Aliases: 12 Practical Examples
One alias per site, switched off when a site leaks. Twelve practical examples of how to use email aliases, from online shopping to banking, plus where they stop helping.