DNS blacklist (DNSBL) monitor software is used to monitor your email server public IP address in DNS blacklist zones like zen.spamhaus.org and many others.
Why you should use DNS blacklist monitor software
Blacklist monitor software lets e-mail system administrators know before users told them that there is a problem in outbound e-mail messages because DNS blacklist monitor software continuously checks if your public IP address is listed in any DNS blacklist and if public IP address of email server has been accidentally registered in any DNS blacklist zone, DNS blacklist monitor software will send a notification to the administrator to take action about this issue and minimize down time for outbound email messages.
Of course some outbound messages may be rejected by recipients which depends on what DNS blacklists used by recipients Anti-Spam and time taken to resolve the issue.
The below flow chart show how your outbound email messages will be checked for spam on the recipient email server side (Image from spamhaus).
Why getting blacklisted in DNS blacklist zone is dangerous
Because if you are not using early notification system like DNS blacklist monitor software you may not know the issue unless some users begin to complain and in this case you will lose a lot of email outbound messages which are not recoverable and users have to send these emails again. for example if your email server public IP address accidentally blacklisted at 9 AM and you know about the problem at 11 AM then begin to troubleshoot and resolve the issue at 11:30 AM.
so you loose outbound messages between 9 AM and 11:30 AM and you have to told users about this issue to resend their emails if it didn't reach recipients.
you will also note that some recipients may send you a rejected message and others may not.
Ultra Downloader 2.4.29 With Ultra-Downloader you can easily download many files from a web page! Have you ever tried downloading several image files from a web page by right-clicking on the image to call up the popup menu then selecting the...
Proxy Auto Checker 1.0 Proxy Auto Checker - free and powerful solution for autoload and checking the lists of proxy servers.
Quick YouTube Downloader 2014 Quick YouTube Downloader is a free program that downloads videos from YouTube in to multiple formats and qualities at extremely fast speeds.
With Quick YouTube Downloader, you can:
-Download and convert multiple videos from 244p to 1080p HD.
-Download videos in to MP4, MP3, FLV, 3GP , WEBM and M4A...
Posixspwn 2.0.7 Posixspwn free application can be use to jailbreak Ios 6 running devices. Posixspwn downloader allows you to find best solution compatible with your device configuration. You need to spend only 5 minutes of time to complete process, our help file...
Do-download.com do not supply any crack, patches,torrent, password, serial numbers, registration codes, key generators, cd key, hacks or keygen for the software,and please consult directly with program authors (BLmonitor) if you have any problem with the software.