Side by side
ImprovMX vs MailerZ
Both stand on email forwarding services. Which one you can start free with, which one lets you read the code, and what each costs once you pay.
Free plan APIWeb
ImprovMX offers custom-domain forwarding, routing controls, and API access across free and paid plans. Review the daily forwarding allowance and SMTP requirements before relying on it for a domain.
Visit ImprovMX
Free plan APIWeb
MailerZ focuses on custom-domain routing, forwarding, delivery visibility, and authenticated SMTP rather than hosting a conventional mailbox. Check the Free plan limits and retention period before relying on it for sending or recovery.
Visit MailerZThe facts
| ImprovMX | MailerZ | |
|---|---|---|
| Free plan | Yes | Yes |
| Open source | Not published | Not published |
| Runs on | API, Web | API, Web |
| Lowest paid plan | Light: $50 a year | Solo: $40 a year |
| Plans published | 5 | 6 |
| Maker | Not published | Not published |
| Website | improvmx.com | mailerz.net |
| On email forwarding services | #7 of 25 | #11 of 25 |
ImprovMX: what it does well
- Free plan includes one domain and 25 aliases.
- Catch-all, regex, and customizable routing rules.
- One alias can forward to multiple destinations.
- REST API manages domains and aliases.
- Logs show delivery status without email content.
What to know first
- Free plan caps forwarding at 500 emails per day.
- SMTP sending requires a paid plan.
- Quota overages stop processing and bounce incoming mail.
MailerZ: what it does well
- Forwards mail from verified custom domains.
- Keeps the original sender visible on forwarded messages.
- Delivery logs include outcomes, codes, and explanations.
- Works with common mail clients and SMTP-enabled apps.
What to know first
- Free plan disables sending, SMTP, and API.
- Free message storage lasts 14 days.
- Not an IMAP or POP mailbox host.
- Not SOC 2, ISO 27001, or HIPAA certified.
Alternatives to ImprovMX Alternatives to MailerZ The whole list