Have any about a Delivery Status Notification (Failure) code 501
Posted on 2008-10-23
We are receiving the following delivery status notification when we are sending e-mails to a specific domain, let's say domain.com.
The error message is:
"The following recipient(s) could not be reached:
Krrrrr@domain.com on 10/23/2008 12:07 PM
There was a SMTP communication problem with the recipient's email server. Please contact your system administrator.
<mail.mydomain.com #5.5.0 smtp;501 Failure Bad FROM MX record (cached), Setting G_BADFROM_NOIP> "
I have to specify that we are using our own smtp server (not ISP's server) that is behind a FW in DMZ, while our domain DNS records are administred by our ISP. Have you any ideea about this DSN error?