Are you perhaps talking about domain literals? E.g. the format [EMAIL PROTECTED]

When I run this:
http://www.dnsreport.com/tools/dnsreport.ch?domain=your.domain.here

against my domains it gives me this:

WARNING: One or more of your mailservers does not accept mail in the domain literal format ([EMAIL PROTECTED]). Mailservers are technically required RFC1123 5.2.17 to accept mail to domain literals for any of its IP addresses. Not accepting domain literals can make it more difficult to test your mailserver, and can prevent you from receiving E-mail from people reporting problems with your mailserver. However, it is unlikely that any problems will occur if the domain literals are not accepted (mailservers at many common large domains have this problem).
somehost.somedom.net's [EMAIL PROTECTED] response:
    >>> RCPT TO:<[EMAIL PROTECTED]>
    <<< 550 Relaying denied (#5.7.1)

But note that its not require_resolvable_fromhost that's behind the DENY anyway.

Do the gurus reckon this is something that's not worth honouring anyway?

BTW: require_resolvable_fromhost is a stellar performer when it comes to rejecting junk; usually about the same percentage as spamassassin.


C.

On 20/09/2006, at 01:23, Richard Siddall wrote:

Hello,

We're running 0.32 and experiencing a problem where the
require_resolvable_fromhost plugin appears to be rejecting domains
having an MX record with a numeric IP address instead of a host name.

I've taken a look at the bugs on rt.perl.org and done a few web
searches, and I can't seem to find any indication that anyone else has
run into this.

I just thought I'd check if it's a known problem before attempting to
debug it. (From a preliminary look at the code it looks like the plugin
attempts to handle this case.)

Of course, if a new release is coming out in the next few days, maybe I
should try that instead ;>

Regards,

        Richard Siddall


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