> Original-recipient: rfc822;[EMAIL PROTECTED] > Final-recipient: rfc822;[EMAIL PROTECTED] > Action: failed > Status: 5.0.0 (SMTP transmission failure has occurred) > Remote-MTA: dns;mailgw2.mailserveren.com > (TCP|194.48.125.36|33097|213.236.237.229|25) > (mailgw2.mailserveren.com - ESMTP - Postfix - Attn: UCE trespassers will be > pursued.) > Diagnostic-code: smtp;550 Error: ACL header_2
It means you have a block somewhere named "ACL header_2" With that name, I would look at header checks. If you are not sure what your header checks file is named: postconf | grep header --Eric
