You said ".usually to companies." There are other "bad" addresses? Do they have anything in common? Also, do you have any type of outgoing filters other than virus scans that may interfere? Nothing you can do from your side, but you might want to call the folks at Naramata and get them to yell at their email hosting service. Since the "MAIL" command failed, everything after will fail because you *must* have a successful "MAIL" before you can issue a "RCPT", and so on. If it were working correctly, the response to "MAIL From:" should be "250 - Sender OK" which means ONLY that the sender's address is in a proper format for ESMTP and the sender's domain is not on a known black list. Telnet mx. 25Ĭonnected to mx.Ĭonnection to mx. closed by foreign host. Thread-Index: Ac5cdl3BbhKn8RIWRouuauOgH3Julg=īoundary="_000_AAF1C076E8BBF2499D362F8554722C6FB2F359CMEX10ColoradoMan_"Īccording to dig, the MX for the domain points to mx.:
Generating server: #500 Syntax error, command unrecognized # If the problem continues, please contact your helpdesk.ĭiagnostic information for administrators: Imf17.b. rejected your message to the following e-mail addresses:Ī problem occurred during the delivery of this message to this e-mail address.
If I send an email to the same address, I get the NDR as well.
The addresses are usually to companies as opposed to major providers such as Outlook, Gmail, Comcast, etc. Multiple users are receiving NDRs when sending to some addresses.
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