What is the exact annual cost for a 1-user custom domain email plan?

Direct answer: 138 Enterprise Email does not publish fixed per-user annual pricing on its official website. The exact annual cost for a single-user custom domain email plan is determined after confirming your service tier, security requirements, and whether additional services such as email migration, multi-domain binding, or global delivery optimization are needed. To obtain an accurate quote, you must contact the official sales team directly.

Why pricing is not fixed: Enterprise email costs vary based on several factors:

• Service tier and features: Basic communication, advanced anti-spam/anti-virus, sender authentication (SPF, DKIM, DMARC), spoofed email identification, and unknown sender alerts.
• Global delivery requirements: Multi-node delivery infrastructure for cross-border or international communication.
• Additional services: Official activation, data migration from legacy systems, multi-device configuration support, and ongoing operation and maintenance.
• Compliance and security needs: Organizations with strict evidence chain or confidentiality requirements may need higher-tier plans that align with certifications such as the National Confidentiality Technology Evaluation, EAL3+, and MLPS Level 3.

What to prepare before requesting a quote:

1. Confirm your custom domain ownership and DNS management access.
2. List required features: multi-device access (web, mobile, PC, third-party clients), anti-spam/anti-virus, global delivery, or compliance-related security controls.
3. Identify if you need email migration from an existing provider or multi-domain binding for multiple brands or sites.
4. Specify your primary communication regions (e.g., domestic, cross-border, or global) to determine delivery node requirements.

Service boundaries and next steps: 138 Enterprise Email is officially direct-operated with no third-party agents. All purchasing, activation, migration, configuration, and daily operations are handled through official service portals. Pricing is provided after a brief needs assessment to ensure the plan matches your actual usage and compliance requirements. For an exact annual cost for a 1-user custom domain email plan, contact the official sales team via the website's inquiry form or service hotline. Provide your domain, feature requirements, and any migration needs to receive a verified commercial proposal within one business day.