Hello. I have a Debian+postfix+dovecot+amavisd-new+spamassassin+clamav mail server in a dedicated link. In other link, I have a proxy server and behind it a LAN.
I sole to receive some error messages sometimes while sending mail from the LAN (and sometimes when sending from other places). I made a change in the DNS at mail server in order to use SPF records and the problem has reduced, but still appears sometimes. I put here two examples: 1 ---------------------- A message from <[email protected]> to: -> [email protected] -> [email protected] -> [email protected] -> [email protected] -> [email protected] -> [email protected] -> [email protected] was considered unsolicited bulk e-mail (UBE). Our internal reference code for your message is 17795-05/nIvSxFnP6GC2 The message carried your return address, so it was either a genuine mail from you, or a sender address was faked and your e-mail address abused by third party, in which case we apologize for undesired notification. We do try to minimize backscatter for more prominent cases of UBE and for infected mail, but for less obvious cases of UBE some balance between losing genuine mail and sending undesired backscatter is sought, and there can be some collateral damage on both sides. First upstream SMTP client IP address: [189.205.113.34] proxy.raconsultores.com.mx According to a 'Received:' trace, the message originated at: [189.205.113.34], AUDITORIA proxy.raconsultores.com.mx [189.205.113.34] Return-Path: <[email protected]> From: "Aurelio Arrocena" <[email protected]> Message-ID: <!&! AAAAAAAAAAAYAAAAAAAAAJEJ4TNAvRNKtu96CAKdDE7CgAAAEAAAAL07uVnfpw5EqRSGhtSQ [email protected]> Subject: =?iso-8859-1?Q?REVISI=D3N_SERVICIO_CAPUCHINAS=2C_S.A._DE_C.V.?= Delivery of the email was stopped! end example 1 --------------------------------- 2 --------------------------------- A message from <[email protected]> to: -> [email protected] was considered unsolicited bulk e-mail (UBE). Our internal reference code for your message is 09407-07/6I0mqlkezAyZ The message carried your return address, so it was either a genuine mail from you, or a sender address was faked and your e-mail address abused by third party, in which case we apologize for undesired notification. We do try to minimize backscatter for more prominent cases of UBE and for infected mail, but for less obvious cases of UBE some balance between losing genuine mail and sending undesired backscatter is sought, and there can be some collateral damage on both sides. First upstream SMTP client IP address: [189.205.113.34] proxy.raconsultores.com.mx According to a 'Received:' trace, the message originated at: [189.205.113.34], ZCMODELOSPC proxy.raconsultores.com.mx [189.205.113.34] Return-Path: <[email protected]> From: "Gabriela Perez " <[email protected]> Message-ID: <[email protected]> Subject: VIAJE CANCUN Delivery of the email was stopped! end example 2 --------------------------- Yesterday, a new case appeared when a similar message included a legend about a missing header field (Date). Any idea? Thanks in advice. Armando Soto
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