email problem

[redhat]

Toto Gamez wrote:

> Does this also means that we will received alot of spam mail?
>  
> thanks
>
>     ----- Original Message -----
>     *From:* Cowles, Steve <mailto:steve at stevecowles.com>
>     *To:* 'General Red Hat Linux discussion list'
>     <mailto:redhat-list at redhat.com>
>     *Sent:* Thursday, April 29, 2004 10:01 AM
>     *Subject:* RE: email problem
>
>     > From: Toto Gamez
>     > To: redhat-list at redhat.com <mailto:redhat-list at redhat.com>
>     > Subject: email problem
>     >
>     > Hi
>     > We're having problem in receiving e-mail, our pque branch is
>     connected
>     > to the internet via myDSL. They are sending email thru
>     smtp.info.com.ph
>     > as their smtp and retrieved mail thru our pop3 located in Pasay
>     (postfix)
>     > but everytime they send email at our domain (@bonheur.com.ph) we
>     cant
>     > received their mails. When I checked the maillog it says:
>     >
>     > Apr 27 16:42:21 pasay postfix/smtpd[31895]: warning: 203.131.180.85:
>     > hostname adsl-131.180.85.info.com.ph verification failed: Host
>     not found
>
>     [snip...]
>
>     In short, postfix is reporting that the A record and PTR record
>     for the
>     connecting IP do not match. Example: Using your log entry above...
>
>     [scowles at voyager log]$ host 203.131.180.85
>     85.180.131.203.in-addr.arpa domain name pointer
>     adsl-131.180.85.info.com.ph.
>
>     [scowles at voyager log]$ host adsl-131.180.85.info.com.ph
>     Host adsl-131.180.85.info.com.ph not found: 3(NXDOMAIN)
>
>     I'm not a postfix expert by any means, but I had to configure
>     postfix to be
>     slightly less restrictive with regards to what postfix considers
>     unknown
>     clients. I did so by commenting the following in main.cf
>
>     # reject_unknown_client
>
>     Personally, I don't like commenting the above, but there seems to
>     be a lot
>     of IP addresses that do not match A/PTR records from legitimate
>     sources.
>     <groan>
>
>     Steve Cowles
>
>
>
what it means it that you will not be useing reverse dns lookup to 
filter out bogus messages so yes you probably will see more spam

Bryan Elliott