Mail appeared to be SPAM or forged

[pstanbra]

(09-11-2011 09:04 PM)JCircle Wrote:  you can also check here http://www.scconsult.com/bill/dnsblhelp.html
for more info as to why your ip might be on this list.

Thank-You both for your comments. I think this will help a lot of people as to clarify the situation.

In my case - my clients are receiving 2 types of messages. The one I've described above and


Your message did not reach some or all of the intended recipients.

Subject: RE: Board Meeting Oct 2011
Sent: 12/09/2011 09:53

The following recipient(s) cannot be reached:

'name on 12/09/2011 09:53
554 5.7.0 Reject, id=03125-14 - SPAM

'name' on 12/09/2011 09:53
554 5.7.0 Reject, id=03125-14 - SPAM

'Namei' on 12/09/2011 09:53
554 5.7.0 Reject, id=03125-14 - SPAM

'name' on 12/09/2011 09:53
554 5.7.0 Reject, id=03125-14 - SPAM




If I look at the mail.log - the error is:

Sep 12 01:26:56 web1 postfix/smtpd[28165]: connect from 201-3-18-104.gnace701.dsl.brasiltelecom.net.br[201.3.18.104]
Sep 12 01:26:59 web1 postfix/policyd-weight[3823]: weighted check: IN_DYN_PBL_SPAMHAUS=3.25 IN_SBL_XBL_SPAMHAUS=4.35 NOT_IN_SPAMCOP=-1.5 NOT_IN_BL_NJABL=-1.5 IN_IPv6_RBL=4.25; <client=201.3.18.104> <helo=201-3-18-104.gnac

550 5.7.1 <from email>: Recipient address rejected: Your MTA is listed in too many
DNSBLs; check http://www.robtex.com/rbl/201.3.18.104.html; from=<from email> to=<from email> proto=SMTP helo=<201-3-18-104.gnace701.dsl.brasiltelecom.net.br>

OUR server IP is not on any Blacklist.
If we do a DNSBL check on 201.3.18.104 - we can see it is listed on a few Blacklists

1. I presume the message the customer receives is FROM our MailServer and not from the Remote Server.

2. I assume that some check has been conducted on the destination mail server IP. However if this is so - why does the fact that THEY are on a blacklist matter if the Customer is sending mail TO THEM. (assuming im correct on this point). What is the procedure no NOT check on SENDING to mail server but leave RECEIVING from servers with BL checking on

3. If 3 is incorrect - What is going on?