Viet Nam

A Free Address Undermines a Credible Business

A client, supplier, or bank that receives an invoice from a free personal mailbox reads it as unpolished, not professional. In Vietnam's fast-digitizing business environment, a domain-matched email address is one of the simplest signals that a company is properly established and worth trusting with a contract. Professional email is a small investment that pays back in credibility every time a message is opened.

Phishing Dominates Vietnam's Rapidly Growing Threat Landscape

Viettel Cyber Security's Q3 2025 report recorded over 6.5 million stolen personal accounts in Vietnam, up 64% from the previous quarter, alongside nearly 4,000 phishing domains — a 325% jump. Separate 2025 monitoring found phishing emails made up 69% of email-borne threats (3,198,742 events), with business email compromise itself accounting for another 7.6% of cases, and close to 883,000 AI-generated phishing emails detected, personalized down to a target's exact name, job title, and real work context. Vietnamese police reported nearly 1,500 online fraud cases in just the first eight months of 2025, causing losses exceeding VND 1.66 trillion, with business email compromise identified regionally as one of the most common scam types driving Southeast Asia's $23.6 billion in cyber fraud losses between August 2024 and August 2025.

Unverified Domains Get Sent to Spam or Blocked

Mailbox providers score every sending domain before a message reaches an inbox. A domain without SPF, DKIM, and DMARC authentication looks unverified to these filters and gets routed to spam or blocked outright, regardless of how legitimate the sender is. Every quote, invoice, or follow-up lost this way is business the company never knew it lost.

Vietnam's New Personal Data Protection Law Applies to Business Email

Vietnam's Law on Personal Data Protection (PDPL), passed in June 2025 and effective January 1, 2026, elevated data protection from decree-level rules to full statutory law, with its guiding Decree No. 356/2025/ND-CP introducing expanded extraterritorial reach, mandatory impact assessments, and penalties of up to 5% of a company's prior-year revenue in Vietnam for violations involving cross-border data transfers. Business email, which routinely carries customer records, contracts, and payment instructions, falls directly within the scope of this framework for organizations handling that data.

What to Do Right Now

Every week spent on an unverified or personal mailbox adds to the risk of impersonation, blocked mail, and BEC fraud. Vietnamese businesses should move to a verified company domain, implement SPF, DKIM, and DMARC authentication, and require phone verification for any payment or bank-detail change requested by email. UCN Mail is built to make that shift straightforward — professional email with the authentication, security, and reliability a Vietnamese business needs to be trusted and reach the inbox.

Vietcombank Warned Businesses After Hackers Altered Payment Details by Email
Vietcombank and BIDV issued a joint warning after businesses lost money when hackers broke into a company's email to change the beneficiary details on contracts and invoices — sometimes editing a signed contract's terms, sometimes inserting fake payee information — before the fraudulent details went out to a real trading partner. Both banks now advise verifying any change in a partner's payment instructions through a separate channel entirely, since the email itself may be compromised. A properly authenticated business domain reduces the chance that an attacker can break into or convincingly spoof your business's email in the first place.

914,000 SMEs Make Up 98% of Vietnamese Businesses
Vietnam counted roughly 914,000 registered SMEs by 2026, representing 98% of all businesses and contributing 45% of national GDP — yet only 36,000 of them currently export, capturing just 6.7% of the country's total export value. As more Vietnamese SMEs try to reach that international market, professional email is often the first thing a foreign buyer or partner evaluates before trusting a new supplier.

Nghị định 254/2026 Keeps Changing the Rules on E-Invoices
Vietnam's e-invoicing regulations continue to evolve, with Decree 254/2026/NĐ-CP introducing new requirements around invoice timing, cash-register invoice data submission, and consumer sales reporting. Email remains the channel for everything surrounding those invoices — quotes, order confirmations, and client follow-up — so keeping that correspondence secure matters just as much as staying current with the invoicing rules themselves.

A Free Gmail Address Still Undercuts an Export-Ready Business
Many small Vietnamese businesses default to a personal Gmail address, which can look informal to an international buyer comparing suppliers. A domain-matched address — [email protected] or .com — is a small, low-cost signal that a business is built for serious, ongoing trade relationships.

Getting Started: What You'll Need
Have your domain name ready (or one to register), a short list of who needs a mailbox, and about 15–20 minutes to update your domain's DNS records with your registrar. UCN Mail handles domain verification and authentication setup, so your invoices and client correspondence land reliably — and are far harder for a scammer to convincingly spoof.