SynopsisThis guide will explain why some clients have been unable to send mail to recipients whose mail server is using the UCEPROTECT blacklist
Applicable toAll hosted Exchange 2010 accounts
A hosted Exchange 2010 account
Regarding this problem, we have been doing research to ensure that our service flow is not affected. Most importantly, cracking down on users sending excessive amounts of emails is one of our priorities and will continue to be.
The following tool is able to scan more than 30 independent blacklist systems: http://openrbl.org/client/
After scanning our IPs, we found out that we had been blocked by UCEPROTECT. This list as well as the one in this FAQ (out of over 30 lists) is blocking our IPs. This blacklist system is surely not the most trusted on the net because they ask you to pay for your IP to be removed. The only other way to remove the IP from the list is to wait 7 days. We strongly discourage any email administrator from using the UCEPROTECT blacklist since it is completely unreliable and untrusted.
Unfortunately, since PlexHosted does not want to encourage this kind of system, we will not pay to be removed. We are sorry about any inconvenience this may cause.Please note that BACKSCATTER.ORG is another list powered by UCEPROTECT that has the same policies. It sometimes lists our MX records with no impact to our end users.
If you need further assistance, please do not hesitate to contact us.
KeywordsBlacklist, Protection, mail, server
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