This is basically what I told the sender as well.
I wasn't suggesting that ASSP were to accept the message and bounce it
later. I was saying that in this case, when you do an MX lookup on
www.webengineer.com, it shows no associated MX record, but it does show
that the A record for www.webengineer.com contains a CNAME for
webengineer.com, and THAT does in fact have an MX record. The DIG
utility is smart enough to follow this chain, I was wondering if ASSP
should be able to do the same thing.
On 2/10/2015 12:47 PM, Colin wrote:
> 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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> ------------------------------------------------------------------------------
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> hub for all things parallel software development, from weekly thought
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Dive into the World of Parallel Programming. The Go Parallel Website,
sponsored by Intel and developed in partnership with Slashdot Media, is your
hub for all things parallel software development, from weekly thought
leadership blogs to news, videos, case studies, tutorials and more. Take a
look and join the conversation now. http://goparallel.sourceforge.net/
_______________________________________________
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