Hi Scott,
This would break many things. If we are to accept the message then
bounce it later, where does the bounce go? Do we try to figure it out
and send it to www instead of web. or do we just end up with a
non-deliverable NDR sat in our queues? The former is really bad because
someone could set up a shill domain and point it at a target to use for
mailbombing.
Really, the way that ASSP acts is in accord with how things should be
set up on the Internet. The people responsible for webengineer.com
should defined MX records for web. if they wish to use it to send email.
If you want to over-ride this yourself, the best thing to do is to set a
whitelist entry on your server.
All the best,
Colin Waring
On 10/02/2015 15:54, Scott MacLean wrote:
> I have a client who is being blocked because ASSP is reporting that
> their domain does not have a valid MX. The domain in question is
> www.webengineer.com:
>
> Feb-09-15 16:00:22 NB-15619-06295 [Worker_2] [MissingMX] {IPAddr}
> <#####@web.webengineer.com> to: #####@####.org [scoring] MX missing
> (cache): web.webengineer.com
>
> However, doing a lookup against web.webengineer.com shows:
>
> ;www.webengineer.com. IN MX
>
> ;; ANSWER SECTION:
> www.webengineer.com. 3600 IN CNAME webengineer.com.
> webengineer.COM. 3585 IN MX 1 mail.webengineer.com.
>
> So www.webengineer.com is a CNAME to webenginner.com, which in fact DOES
> have an MX, which is mail.webengineer.com.
>
> Is it possible to have ASSP follow that CNAME and do a recursive lookup
> for MX in this type of case?
>
>
>
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look and join the conversation now. http://goparallel.sourceforge.net/
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