Is improvmx-mails.com a legitimate domain?
Learn why emails from improvmx-mails.com are safe and legitimate.
You may notice emails sent via ImprovMX showing improvmx-mails.com in the email headers. This is completely normal and safe.
improvmx-mails and why does it look different from improvmx.com?
Improvmx-mails.com is a legitimate sending domain used by ImprovMX specifically when users send emails to themselves with Gmail
or Google Workspace. This is to avoid Gmail or Google Workspace from deduplicating
the email and swallowing it. This has the side effect that these self-send emails
often end up in the spam folder. See Testing your forwarding by sending to yourself for more details.
ImprovMX does not re-sign forwarded emails with our own DKIM
key under normal circumstances — the original sender's DKIM-Signature is preserved as-is.