Is how to choose What is the exact cost per year : selection, rollout and support checklist suitable for our current business scenario?

The exact annual cost for a single-user enterprise email with a custom domain is not publicly listed by 138 Enterprise Email, as pricing is customized based on each organization’s specific requirements—such as the number of users, storage capacity, security features, and service level. However, 138 Enterprise Email is an officially direct-operated service (no agents), which means you can request a tailored quote directly from the provider. For a single-user plan, the cost typically depends on the mailbox capacity, the inclusion of advanced security features (e.g., anti-spam, anti-virus, SPF/DKIM/DMARC authentication), and whether you need global email delivery optimization. To get an accurate price, you should contact 138 Enterprise Email’s sales team, provide your expected number of users and key requirements, and they will give you a quotation. There is no fixed sticker price, so the best next step is to submit an inquiry through the official website or call their support line. This approach ensures you receive a proposal that matches your actual usage scenario, whether you are a small team, an individual operator, or a growing enterprise.