Online Mail Server Blacklist Checker tests whether a specific mail server
is listed in one or more of the well known and widely used DNSBL (DNS-based Blackhole List) and RBL
(Real-time Blackhole List) blacklists.
Having the mail server you use for sending your emails on one or more blacklists may
cause that your messages will never reach their recipients. Mail server
administrators commonly use tools such as Online Mail Server Blacklist
Checker when there is a possibility that their servers have become
blacklisted.
When a blacklisted mail server attempts to send an email to a mail server
that is protected against spam with a solution that relies on using
blacklists, the target mail server refuses to accept the message or even
blocks the initial network connection from the blacklisted address. For the
blacklisted mail server it is thus impossible to deliver the email to the
target mail server.
One of the techniques that spammers use is to hack computers on the
Internet and use them as their own mail servers to send tons of spam
messages. Every imperfectly protected machine on the network is a potential
source of spam. Various IP blacklists attempt to fight spammers by
blacklisting every computer that is suspected to be misused by spammers.
Even if a legitimate owner finds out the problem on its machine, fixes the
security hole and cuts off the spammer, the blacklists will remain to
identify the affected server's IP address as a potentially dangerous
source. In such a case the administrator of the server is required to ask
for a removal, which can be sometimes an uneasy and time consuming process.
Using Online Mail Server Blacklist Checker quickly after a suspicion of
having a blacklisted server arises can save you plenty of time and prevent
lots of troubles. With a single click you will get information from more
than 150 blacklists on whether your server is blacklisted or not.
The used blacklists are not under the control of Online Domain Tools. If you found your
computer on a blacklist and want to be removed, you have to contact the blacklist owner directly.
After the check is done, move your mouse over the question mark to see the removal link.
The only things you have to do to use Online Mail Server Blacklist Checker
is to specify the host name or an IP address of the server that you want to
have checked in the Host / IP address field and then to click
the "Check!" button. If you specify a host name it will be translated to an
IP address before it is checked.
API for Mail Blacklist Checker is available in
Online Domain Tools API.
