Setup guides

Error codes returned by ImprovMX’s SMTP server

A list of error codes returned by our server when you try to send an email. Bounce, anti-spam, loop detection error codes.

What are the allowed attachments?

We forward emails with attachments for up to 10Mb per email and up to 25Mb for our premium members. Some file types are forbidden.

What does “Invalid DKIM signature” means?

Testing your forwarding from the same Gmail account

Some emails are refused because of Spamhaus, why?

Why don’t we offer SPF support?

Updating your ImprovMX domain’s login email

Setup guides

Free email forwarding with Cloudflare

Follow our step-by-step guide to setup free email forwarding on your Cloudflare hosted domain. It's free and only takes a minute.

Send emails using Gmail

Add any ImprovMX aliases as a sending email on Gmail, using the "Send Mail As" feature. It's free, reliable, and only takes a minute to setup.

Free email forwarding with GoDaddy

Follow our step-by-step guide to setup free email forwarding on your GoDaddy hosted domain. It's free and only takes a minute.

Free email forwarding with Amazon Route53

Follow our step-by-step guide to setup free email forwarding on your Amazon Route53 hosted domain. It's free and only takes a minute.

Free email forwarding with Namecheap

Follow our step-by-step guide to setup free email forwarding on your Namecheap hosted domain. It's free and only takes a minute.

Free email forwarding with Google Domains

Avoid paying for GSuite. Follow our step-by-step guide to setup free email forwarding with Google Domains. It's free and only takes a minute.

Free email forwarding with DigitalOcean

Follow our step-by-step guide to setup free email forwarding on your DigitalOcean hosted domain. It's free and only takes a minute.

Configure your DNS

Follow this quick step-by-step guide to set your MX records and start forwarding emails for free using ImprovMX. It just takes a minute!