http://issues.apache.org/SpamAssassin/show_bug.cgi?id=5092
[EMAIL PROTECTED] changed:
What |Removed |Added
----------------------------------------------------------------------------
Status|RESOLVED |REOPENED
Resolution|WORKSFORME |
------- Additional Comments From [EMAIL PROTECTED] 2006-12-06 00:40 -------
hello,
i use the mailserver from my provider as smarthost and i have no possibility to
affect, what headers are inserted from this mail-server.
if i send mail direct to the mailserver from my provider, i have this headers:
Received: from unknown (EHLO [0.1.0.4]) [194.97.125.65]
by mail.gmx.net (mp001) with SMTP; 06 Dec 2006 09:08:09 +0100
X-Authenticated: #222744
or:
Received: (qmail invoked by alias); 06 Dec 2006 08:04:55 -0000
Received: from E7d41.e.strato-dslnet.de (EHLO [0.1.0.4]) [194.97.125.65]
by mail.gmx.net (mp001) with SMTP; 06 Dec 2006 09:04:55 +0100
X-Authenticated: #222744
i have always dynamic ip-adresses in the header, but here it is the first
received entry and if i use my mailserver it is the second or third entry.
the most logins to the internet in germany have dynamic ip-adresses and this is
only an indication for spam, if this mail is not relayed by the mail-server for
the maildomain of the sender.
i know, that this is a problem, if all headers are ignored, which are before the
mailserver for the sender domain, somebody can insert some headers to disable
this checking. but all mails must relay by a mailserver and as example, no
mailserver from gmx.de sends mails to web.de through a mailserver of an other
provider.
it is simple to check this, if i receive the mails with my own mailserver, i can
check the sender ip and if it is dynamic or not from a mailserver of the sender
domain, i can reject the mail, but i use fetchmail, to get the mails from my
provider and use spamassassin the check the mail before my local mailserver get
the mail to send it to my local p.o. box.
this makes it difficult, to detect mailservers with dynamic ip-adresses. only if
one header have a dynamic ip-adress and the following mail-server is not the
mailserver for the sender domain, it is possible, that the mail is spam.
i don't know the best method, to check for dynamic-mailserver-ip-adresses in
this situation, but the check which spamassassin makes, makes problems for this
configuration.
goodby
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