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ImprovMX
United States
What it is
ImprovMX provides email forwarding for custom domains, with options to send and receive domain email. It supports catch-all and regex aliases, customizable routing rules and forwarding one alias to multiple destinations. Users can send from a custom domain through SMTP or the JSON Send API, but SMTP sending is a paid-plan feature. Its REST API can manage domains and aliases programmatically. The free plan includes one domain, 25 aliases, 500 forwarded emails per day and seven-day email-log retention. Premium costs $9 a month, Pro costs $24 a month, and Light costs $50 a year. Logs show delivery-event details such as subject, sender, destination and status, but not message content. The maker says stored data is encrypted, supported SMTP connections use TLS in transit, and forwarded email content is not logged. Free accounts include standard email and chat support; paid plans vary in support and log retention. If an account reaches its forwarding quota, processing stops until 00:00 UTC, and mail received during that time is bounced to senders.
For and against
For
- Supports catch-all and regex aliases.
- One alias can forward to multiple destinations.
- Free plan includes API access.
- Delivery logs omit email content.
Against
- Free plan allows 500 forwarded emails per day.
- SMTP sending requires a paid plan.
- Quota exhaustion pauses processing and incoming mail is bounced.
- Free email logs are retained for seven days.
The verdict
ImprovMX offers custom-domain forwarding with routing rules and API access, plus paid SMTP sending. Compare the forwarding quota and log-retention limits with your needs, since reaching the quota stops processing until its reset.
Who it suits
ImprovMX may suit people or organizations that want email forwarding for a custom domain, including those managing aliases through an API. Its daily forwarding quota and email-log retention limits are relevant when choosing a plan.
Plans and prices
Free
1 domain · 25 aliases · 500 forwarded emails/day · 7-day email log retention
Read 30 Sep 2026 · improvmx.com
Premium
Up to 30 domains · 100 aliases/domain · 10 rules/domain · 5,000 forwarded emails/day
Read 30 Sep 2026 · improvmx.com
Pro
Up to 100 domains · 200 aliases/domain · 50 rules/domain · 15,000 forwarded emails/day
Read 30 Sep 2026 · improvmx.com
Light
Up to 5 domains · 25 aliases/domain · 5,000 forwarded emails/day · 750 SMTP sends/month
Read 30 Sep 2026 · improvmx.com
Enterprise
Unlimited domains, aliases, forwarding, and SMTP sends · dedicated account manager · support SLAs
Read 30 Sep 2026 · improvmx.com
On the record
- API
- The REST API lets customers programmatically manage domains and aliases for email forwarding.improvmx.com · read 30 Sep 2026
- Certifications
- ImprovMX says it does not pursue SOC 2 or ISO 27001 certifications and describes other security measures it uses instead.improvmx.com · read 30 Sep 2026
- Company
- ImprovMX says it was founded in 2013 and is a self-funded company in the United States.improvmx.com · read 30 Sep 2026
- DNS setup
- The maker says premium users can use one-click DNS setup with supported DNS providers, and its June 2026 update says the feature now works with most providers.improvmx.com · read 30 Sep 2026
- Email logs
- Email logs include delivery-event details such as subject, sender, destination, event type, server response, and status code; the maker says logs do not include email content.improvmx.com · read 30 Sep 2026
- Email sending
- Users can send from a custom domain through SMTP or the JSON Send API; SMTP sending is a paid-plan feature.improvmx.com · read 30 Sep 2026
- Integrations
- The maker provides SMTP setup guides for Gmail, Apple Mail, and Thunderbird, and DNS configuration guides for providers including Cloudflare, Namecheap, DigitalOcean, Vercel, and Netlify.improvmx.com · read 30 Sep 2026
- Intended users
- ImprovMX says more than 200,000 users and organizations use it for business, internal tools, and side projects.improvmx.com · read 30 Sep 2026
- Privacy and compliance
- The maker says it is GDPR compliant, does not sell data, and does not log the content of forwarded emails.improvmx.com · read 30 Sep 2026
- Product
- ImprovMX provides email forwarding for custom domains, with options to send and receive domain email.improvmx.com · read 30 Sep 2026
- Retention
- The transparency page says delivery logs are stored for seven days and setup-change records for 365 days, while paid plans list longer email-log retention, up to 180 days or unlimited depending on plan.improvmx.com · read 30 Sep 2026
- Routing features
- It supports catch-all and regex aliases, customizable routing rules, and forwarding one alias to multiple destinations.improvmx.com · read 30 Sep 2026
- Security
- ImprovMX says it conducts annual independent penetration tests, uses TLS in transit for SMTP connections that support it, and encrypts stored data at rest.improvmx.com · read 30 Sep 2026
- Support
- Free includes standard email and chat support; Premium and Pro include priority email and chat support, while Enterprise lists support SLAs and a dedicated account manager.improvmx.com · read 30 Sep 2026
- Usage limit
- When an account reaches its forwarding quota, ImprovMX says it stops processing mail for that domain until the quota resets at 00:00 UTC, and subsequently received mail is bounced to senders.improvmx.com · read 30 Sep 2026
