Is improvmx-mails.com a legitimate domain?

You may notice emails sent via ImprovMX showing improvmx-mails.com in the email headers. This is completely normal and safe.

What is improvmx-mails and why does it look different from improvmx.com?

Improvmx-mails.com is a legitimate sending domain used by ImprovMX to relay forwarded emails.

While our main domain is improvmx.com, we use improvmx-mails.com behind the scenes specifically for email delivery. This domain may appear in technical headers such as Return-Path, Received, or DKIM-Signature.
If you're seeing improvmx-mails.com in the headers of an email sent through our service, it's not phishing. It’s a secure, intentional part of how ImprovMX forwards mail.

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