Urgent: Incoming Email Rejected from echo.com Domain

Hello,

We are experiencing an email delivery issue affecting multiple employees at WTI Distribution Inc. (wtidi.com).

Emails from nick.defelice@echo.com are being rejected by our incoming mail server.

The sender receives the following error:

550 5.1.0 nick.defelice@echo.com sender rejected

Our MX record currently points to mx.wtidi.com.

Please investigate whether this sender or the echo.com domain is being blocked by your server-level spam filtering, sender restrictions, or reputation filtering.

Please review the SMTP rejection logs, identify the exact reason for the rejection, and remove any incorrect block.

This is an important business contact, and we need to restore email delivery as soon as possible.

Thank you.