ImprovMX vs. Fastmail

ImprovMX offers advanced email forwarding to your existing inbox (Gmail, Outlook, etc.), with the option to send via SMTP. Fastmail is a paid hosted mailbox service: they provide the inbox, so you receive, read, and send mail in Fastmail.

Your choice largely depends on if you need a hosted inbox or prefer to use your existing inbox.

Feature
ImprovMX
Fastmail
Customer Support
Live Human & AI Chatbot Support
Email support via ticket submission
Free plan
Free forwarding for one domain. Paid plans for scale.
Paid service only (after 30-day trial)
Mailbox hosting
No mailbox hosting, forwards to existing inbox
Hosted mailbox with contacts and calendar
API
API to manage forwarding, domains and aliases
API manages mailbox
Apps
Just a web app
Web and mobile apps
Setup
Must setup DNS records for forwarding and sending
Easy inbox creation, but a hassle to migrate
Advanced Forwarding
Rules routing, regexes, multi-destination and wildcards[1]
Mailbox rules and regexes
Webhooks
Inbound emails can fire webhook requests
No webhook support
Logging/Analytics
Offers detailed mail logs and log retention > 7 days
No mail log view — troubleshooting is difficult
Compliance
GDPR compliant
GDPR compliant

[1] We offer rules routing, wildcard addresses, multiple recipient destinations, regex aliases and webhooks.

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