Paul Adshead <paul.adshead(a)gmail.com> wrote:
A company in the US that we are trying to contact for
business, is bouncing our email with the following error:
You do not have permission to send to this recipient.
contact your system administrator.
<mailsever.our_company.co.nz #5.7.1 smtp;550 5.7.1
REJECT IP Range Blocked:203 - send questions to emailhelp(a)uscompany.com>
This is notably a technique recently implemented by Verizon and it is
possible that either that domain's MX is operated by Verizon, or the
company you are trying to reach has replicated Verizon's stance.
Gordon Smith <gsmith(a)wxc.co.nz> commented:
Unfortunately there are some in the U.S. that do block
all APNIC space,
mainly due to the amount of spam originating from China and Korea.
That, plus APNIC's reluctance to accept responsibility for legacy errors
in their database.
Personally, I think putting Florida into its own
address range and null
routing it would have a far greater impact on the global spam levels :-)
While that may give a tremendous feeling of satisfaction, it won't
achieve much else. Almost all spammers in Florida are already listed in
various databases such as the SBL, so you shouldn't be getting any spam
directly from there - as long as you use one of the reputable DNSBLs.
The problem is that those spammers rely on custom-compromised Windows
boxes in all parts of the world to relay their spam, and in some cases
drive those compromised boxes from rented servers in South Korea, China
and Hong Kong (a good example right now being "celastruser.com" at
[22.214.171.124], on New World Telephone in Hong Kong ...).
Some countries are either ill-equipped, under-resourced or just plain
unwilling to deal with the proliferation of these compromised boxes,
- the worst such network at the moment being Kornet, in Seoul - so the
image of APNIC IP ranges being a rat's nest of spammers, is perpetuated.
Not that New Zealand networks appear to be that responsive, either ...
has been unresolved
for two months, http://www.spamhaus.org/sbl/sbl.lasso?query=SBL20365
unresolved for nearly four months.
I'd suggest emailing them from an address that
isn't blocked and
point out the error of their ways
In these circumstances, the offered address "emailhelp(a)uscompany.com"
would normally be whitelisted - i.e. it would accept mail which would
have been rejected if sent to any other address in that domain.
Matthew Poole <matt(a)p00le.net> added:
Last ISP I worked for had their whole /18 blocked by a
had seen a single attempt to probe their network. Since we couldn't
e-mail them, it required faxes being sent every two hours for over
a day before they removed the block.
This is where a personal account at Outblaze/Yahoo/Google can save a
lot of money - they all have their servers in "acceptable" IP ranges.