On Mon, 23 Jun 2003, Giuliano Gavazzi wrote:
> Sorry if this has been discussed, I have the impression it might, but
> it appears that exim does not deal well with multiple PTR records.
> I have received an email (spam) with:
>
> Received: from mail.univie.ac.at ([131.130.1.27] helo=mailbox.univie.ac.at)
>
> but
>
> ;; ANSWER SECTION:
> 27.1.130.131.in-addr.arpa. 60402 IN PTR mail.univie.ac.at.
> 27.1.130.131.in-addr.arpa. 60402 IN PTR mailbox.univie.ac.at.
>
> so it looks like exim stopped at the first PTR.
Exim sets up $sender_host_name to the first name it is given by
gethostbyaddr(). It also sets up a list of host alias names from any
aliases that it is given. These are used in various checks. For example,
if in an ACL you say
hosts = some.host.name
then the name and its aliases are all checked.
However, aliases are not used when creating the $sender_rcvhost variable
that is used by default in the Received: header line.
I am not sure what, if anything, should be done about this, because a
host could potentially have a very large number of alias names.
--
Philip Hazel University of Cambridge Computing Service,
ph10@??? Cambridge, England. Phone: +44 1223 334714.
Get the Exim 4 book: http://www.uit.co.uk/exim-book
