Re: [Exim] screwed up servers

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Autor: Jez Hancock
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A: exim users list
Assumpte: Re: [Exim] screwed up servers
On Mon, Sep 15, 2003 at 08:00:38PM -0800, Rossz Vamos-Wentworth wrote:
> I was trying to sign up for a local job board (some of us could use
> some honest work) and got this in my logs when they attempted to send
> me my password:
>
> Sep 15 09:37:17 vife exim: 2003-09-15 09:37:17 no host name found for
> IP address 208.140.9.101
> Sep 15 09:37:17 vife exim: 2003-09-15 09:37:17
> H=(mail.pleasantonjobs.com) [208.140.9.101] sender verify fail for
> <webmaster@???>: all relevant MX records point to non-
> existent hosts
>
> This is the only time I've had this particular problem. Is there
> something I can change in my exim configuration that would allow this
> through without opening up security holes?

I have the following in my configure file to allow me to add domains to
a 'whitelist' file. Mail received from those domains do not undergo
sender verification checks in the rcpt acl:


# Whitelisted hosts:
WHITELIST_DOMAINS_FILE    = /etc/mail/whitelist_domains


<snip>
(this is towards the end of my rcpt ACL, don't want to do this too
early:-)
  # Deny unless the sender address can be verified via callout:
    require verify = sender
    deny !sender_domains = WHITELIST_DOMAINS_FILE
            !verify = sender/callout=55s



--
Jez

http://www.munk.nu/