So, if I understand correctly, issues number 1 and 2 don't matter?
I thought there were possible checks for the server name vs the
reported Domain Name. That is, if the mail is coming from
@mailserver.com, but the server says it's name is
www.anotherserver.com, that some mail servers might tag the mail as
potentially spam. I know that's not necessarily the case, because my
server at work has a different name and mail gets to people.
Also, I thought a DNS check on the Domain Names would show
discrepancies and therefore also result in a spam trigger.
All the Domain Names reported in the headers, however, to have a
valid external DNS.
Thanks.
On 14.04.2006, at 10:04, Gary W. Smith wrote:
Curtis,
It doesn't matter if the server name matches the domain name at all
for
the domains that you are using. In fact, this is quite common in very
large installs (such as ISP's).
The only thing that is critically important is that each machine
involved in the processing of email have a valid DNS entry to go with
that and that the sending domain is also valid.
So, if mail.mailserver.com does not have a valid external DNS entry
that
resolves to something then it will quickly be marked as spam. Same
holds true for www.anotherserver.some.
-----Original Message-----
From: Curtis Vaughan [mailto:[EMAIL PROTECTED]
Sent: Friday, April 14, 2006 9:42 AM
To: users@spamassassin.apache.org
Subject: Spam filters
Question about spam tags, but not specific to spamassassin.
I have a client who has a problem that his email are often tagged as
spam by various servers.
It seems to me some of the following issues might trigger an anti-
spam tool to identify his email as potential spam. I just want to be
sure this is right.
NB. For the sake of this letter his DN is mail.mailserver.com
1. He has a Postfix email server in Seattle.
However, the mx record, however, mail.mailserver.com is located in
LA.
2. His Postfix server name is www.anotherserver.com
It does traceroute to the Seattle area.
3. Of course, I wonder how many people are in his BCC. Have yet to
find out.
Finally, I should say that according to him, it is primarily Yahoo
and Hotmail clients who identify his messages as Junk/Spam. But that
it is not just these. Perhaps someone knows something about Yahoo and
Hotmail's methods for identifying spam.
I'm would like to also ask whether it is at all important that a DN
have not just an mx record for mail.xxx.com, but also smtp.xxx.com.
Seemingly it's not that important, but I can say for sure that if you
were to try to ping smtp.mailserver.com it will time out. That is
there is no record for him for smtp.mailserver.com. But maybe some
spam filters somehow check for that as well? I don't know.
Thanks for any input.
