dattaproffs

So you have heard about senderscore but you think it’s tedious work to go to the website and log in and/or verifying the captcha..

Don’t worry you can the same way as checking dns blacklists (DNSBL) you can check your score from the command line.

Just reverse your IP and do a dns lookup, like this:

nslookup 4.3.2.1.score.senderscore.com

This is a success response:
------------------------------
Non-authoritative answer:
Name:    4.3.2.1.score.senderscore.com
Address:  127.0.4.99

This is a error response:
------------------------------
*** 4.3.2.1.score.senderscore.com: Non-existent domain

nslookup 4.3.2.1.score.senderscore.com

This is a success response:

------------------------------

Non-authoritative answer:

Name: 4.3.2.1.score.senderscore.com

Address: 127.0.4.99

This is a error response:

------------------------------

*** 4.3.2.1.score.senderscore.com: Non-existent domain

Unlike the DNSBL lookup where you where listed if you got a response the score is part of the Address response. So in the exemple above my score is 99.

You take the last part of the response address and that is your score. When you get Non-existent domain as an answer your IP hasn’t sent out enough email for senderscore to do a measure.

This can be done with dig exactly the same way as done in this post about DNSBL

Update:
This is updated twice a day at ~12:00 GMT and ~22:00 GMT so no need to look more than once after these times.

There is a lot of DNS-blacklists out there. Sometimes you just want to check if your IP is listed in one.

A really easy way to do that is to use your shell, terminal, command prompt. Below i will show two examples using nslookup in windows and dig in OSX (Unix).

## You will reverse the ip you wan't to check and add for example .dnsbl.sorbs.net in the examples here my ip is 1.2.3.4

## Windows; nslookup
nslookup 4.3.2.1.dnsbl.sorbs.net

## If you are listed you will get a answer like this
Non-authoritative answer:
Name:    4.3.2.1.dnsbl.sorbs.net
Address:  127.0.0.2

## If not
*** google-public-dns-a.google.com can't find 4.3.2.1.dnsbl.sorbs.net: Non-existent domain


## Unix; dig 
dig 4.3.2.1.dnsbl.sorbs.net

## If you are listed you will get a answer like this
;; ANSWER SECTION
4.3.2.1.dnsbl.sorbs.net 7170 IN A     127.0.0.2

## If not you won't have a answer section


## Often if you are listed you do the same lookup but for TXT-records instead
## Windows
nslookup -type=txt 4.3.2.1.dnsbl.sorbs.net
## Unix
dig -t txt 4.3.2.1.dnsbl.sorbs.net

## You will reverse the ip you wan't to check and add for example .dnsbl.sorbs.net in the examples here my ip is 1.2.3.4

## Windows; nslookup

nslookup 4.3.2.1.dnsbl.sorbs.net

## If you are listed you will get a answer like this

Non-authoritative answer:

Name: 4.3.2.1.dnsbl.sorbs.net

Address: 127.0.0.2

## If not

*** google-public-dns-a.google.com can't find 4.3.2.1.dnsbl.sorbs.net: Non-existent domain

## Unix; dig

dig 4.3.2.1.dnsbl.sorbs.net

## If you are listed you will get a answer like this

;; ANSWER SECTION

4.3.2.1.dnsbl.sorbs.net 7170 IN A 127.0.0.2

## If not you won't have a answer section

## Often if you are listed you do the same lookup but for TXT-records instead

## Windows

nslookup -type=txt 4.3.2.1.dnsbl.sorbs.net

## Unix

dig -t txt 4.3.2.1.dnsbl.sorbs.net

The basics is that if you get a response your IP is listed. There are different type of listings please refer to each services documentation.

You will typically get a response of 127.0.0.x where x has different meaning in different services.

Sometimes they will publish a TXT-record with the A-record to provide some more information about the listing or information on how to delist. So that i something that can be useful to lookup if listed.

ninjafying interwebz

Check your IPs senderscore from the commandline

How to check DNS-blacklists (dnsbl) from commandline (cmd / terminal)