Q. How do I find out if my e-mail server IP address is blacklisted?
A. First make sure you are not source of spam:
a) You have correct reverse IP address mapping
b) Your mail server is not open to spammers
mxtoolbox offers test that will check a mail server IP address against 147 DNS-based blacklists. (Commonly called Realtime blacklists, blocklists, DNSBLs or RBLs). If your mail server has been blacklisted, some email you send may not be delivered. Blacklisting is a common way of reducing spam.
Step # 1: Find out your mail server ip address
For example if your domain name is nixcraft.com
$ host -t mx nixcraft.comOutput:
nixcraft.com mail is handled by 10 ASPMX.L.GOOGLE.com.
Get IP address of this host:
$ host -t a ASPMX.L.GOOGLE.com.Output:
ASPMX.L.GOOGLE.com has address 22.214.171.124
Step # 2: Now visit mxtoolbox site and enter a mail server IP address 126.96.36.199
=> Visit mxtoolbox web site.
=> Enter IP address
- 30 Cool Open Source Software I Discovered in 2013
- 30 Handy Bash Shell Aliases For Linux / Unix / Mac OS X
- Top 30 Nmap Command Examples For Sys/Network Admins
- 25 PHP Security Best Practices For Sys Admins
- 20 Linux System Monitoring Tools Every SysAdmin Should Know
- 20 Linux Server Hardening Security Tips
- Linux: 20 Iptables Examples For New SysAdmins
- Top 20 OpenSSH Server Best Security Practices
- Top 20 Nginx WebServer Best Security Practices
- 20 Examples: Make Sure Unix / Linux Configuration Files Are Free From Syntax Errors
- 15 Greatest Open Source Terminal Applications Of 2012
- My 10 UNIX Command Line Mistakes
- Top 10 Open Source Web-Based Project Management Software
- Top 5 Email Client For Linux, Mac OS X, and Windows Users
- The Novice Guide To Buying A Linux Laptop