improvmx.net

What It Is

ImprovMX is a U.S.-based, bootstrapped and profitable email forwarding service founded in 2013. Its core goal is to simplify sending and receiving setup for custom-domain email. It is not a full collaborative email suite; instead, it focuses on tools for forwarding domain email to an existing mailbox and sending from a custom domain via SMTP.

Core Capabilities

In terms of channels, it covers email only; there is no sign of SMS, voice, or IM support. Features include domain email forwarding, SMTP sending, catch-all, regex aliases, custom routing rules, forwarding one alias to multiple addresses, blackhole addresses, forwarding to Webhooks, and email logs. For performance, the site states that average forwarding takes under 5 seconds, uses an AWS auto-scaling architecture, and handles a large volume of email. In the plan table, Free/Premium/Pro come with a 99% uptime guarantee, while Enterprise offers 99.99%; elsewhere on the site, it also mentions a 99.99% SLA over the past 90 days. Its API capabilities are fairly strong: REST API v3 supports accounts, domains, aliases, bulk operations, white-label domains, and DNS record verification, making it suitable for automated multi-domain management.

Pricing

Pricing is straightforward: Free is $0 and includes 1 domain, 25 aliases, 500 forwarded emails per day, and 7 days of logs, but does not include SMTP sending. Premium is $9/month and supports up to 30 domains, 100 aliases per domain, 5,000 forwarded emails per day, 6,000 SMTP sends per month, and Webhooks. Pro is $24/month, increasing the limits to 100 domains, 15,000 forwarded emails per day, and 30,000 SMTP sends per month. Light is $50/year. Enterprise offers unlimited quotas, a dedicated manager, and an SLA, with pricing available on request.

Pros and Cons

The strengths are its low barrier to entry, a free tier that is viable long term, complete routing and API capabilities, and claims that it does not read emails, does not sell data, and is GDPR-compliant. The downsides are that it mainly solves the forwarding use case and does not provide a full email collaboration ecosystem; the free plan has no SMTP or rules; Enterprise pricing is not transparent; and some SLA descriptions differ across the site.

Who It’s For and Access from China

It is suitable for indie developers, startup teams managing multiple domains, internal tools, lightweight support/contact mailbox scenarios, and anyone who wants to enable custom-domain email at a lower cost than Google Workspace or Microsoft 365. The crawled text does not provide information about access from mainland China, payment methods, or localization, so China accessibility is unknown. If access, payments, or compliance are important, you should test the console, MX connectivity, SMTP connectivity, and invoice/VAT workflow in advance.