mxtoolbox blacklist | Email Check

mxtoolbox blacklist | Email Blacklist Check - See if your server is blacklisted - MxToolbox


The blacklist test will check a mail server IP address against over 100 DNS based email blacklists. (Commonly called Realtime blacklist, DNSBL or RBL).  If your mail server has been blacklisted, some email you send may not be delivered.  Email blacklists are a common way of reducing spam.  If you don't know your mail server's address, start with a MX Lookup.   Or, just send an email to ping@tools.mxtoolbox.com


All of your MX record, DNS, blacklist and SMTP diagnostics in one integrated tool.  Input a domain name or IP Address or Host Name. Links in the results will guide you to other relevant tools and information.  And you'll have a chronological history of your results. 

If you already know exactly what you want, you can force a particular test or lookup.  Try some of these examples:

(e.g. "blacklist:" will do a blacklist lookup)
Command Explanation
blacklist: Check IP or host for reputation
smtp: Test mail server SMTP (port 25)
mx: DNS MX records for domain
a: DNS A record IP address for host name
spf: Check SPF records on a domain
txt: Check TXT records on a domain
ptr: DNS PTR record for host name
cname: DNS canonical host name to IP address
scan: Perform a port scan on the host
whois: Get domain registration information
arin:Get IP address block information
soa:Get Start of Authority record for a domain
tcp:Verify an IP Address allows tcp connections
http:Verify a URL allows http connections  
https:Verify a URL allows secure http connections  
ping:Perform a standard ICMP ping
trace:Perform a standard ICMP trace route
dns:Check your DNS Servers for possible problems  New!
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Source from http://www.gsmaceh.com/2012/03/mxtoolbox-blacklist.html