www.seoconsultants.com/tools/spf/

What is SPF? SPF fights return-path address forgery and makes it easier to identify spoofs. Domain owners identify sending mail servers in DNS. SMTP receivers verify the envelope sender address against this information, and can distinguish authentic me ...

www.spfwizard.net

This ajax enabled wizard will guide you through the process of creating or editing a SPF record for your DNS domain. You should add this DNS record to your domain's DNS configuration.

www.protodave.com/tools/dkim-key-checker/

Use this tool to lookup and verify a DKIM TXT record and determine its public key length. You can read more about why I wrote this tool. Please let me know if you find a record that doesn’t parse properly and I’ll update my code.

www.mail-tester.com/spf-dkim-check

Check if your domain has these 2 email signatures set up and valid. What's DKIM and SPF? They're 2 effective email signatures against spoofing, phishing or impersonation. When recipients receive your emails, their spam filters automatically poke your d ...

spf.myisp.ch

This online SPF checker visualises and verifies SPF records.

www.royhochstenbach.com/projects/spfgenerator/

An easy to use SPF Record Generator

dmarc-qa.com

When a bunch of people make new things all based on a new technical specification, interoperability is often rough around the edges. The folks behind dmarcian put together dmarc-qa.com to host a suite of tests that DMARC developers can use to ensure th ...

www.mailcleaner.net/tools/test_spf.html

This page let you test domains for valid SPF records and/or presence in the MailCleaner's trusted SPF list.

kitterman.com/dmarc/assistant.html

Kitterman Technical Services maintains the best DMARC Record Assistant that can quickly create perfect DMARC records for your domain. DMARC's various record options are clearly explained. Use this to avoid typos and to create records that do what you i ...

www.kitterman.com/spf/validate.html

These tools are meant to help you deploy SPF records for your domain. They use an actual RFC 7208 compliant library (pyspf) for tests and will dynamically test for processing limit errors (no other testers I'm aware of do this). This site uses a cachin ...

www.appmaildev.com/en/spf/

This is a SPF test tool provided by AdminSystem Software Limited. To use it you send an email to the account they temporarily create for you and then you get a reply with a report in it.

This page also has instructions on how to test SPF (Sende ...

www.appmaildev.com/en/domainkeys/

This is a DomainKeys test tool provided by AdminSystem Software Limited. To use it you send an email to the account they temporarily create for you and then you get a reply with a report in it.

This page also has instructions on how to test Dom ...

www.appmaildev.com/en/dkim/

This is a DKIM test tool provided by AdminSystem Software Limited. To use it you send an email to the account they temporarily create for you and then you get a reply with a report in it.

This page also has instructions on how to test DKIM sign ...

www.mtgsy.net/dns/spfwizard.php

This SPF wizard generates DNS records that can be added to your dns zone file based on the information you supply. Suitable for use with almost all dns servers that support TXT and SPF including Cloudfloordns.

www.auditmypc.com/freescan/antispam.html

Anti Spam, the best way to fight spam bots! The purpose of this page is to make it so spammers who attempt to collect email addresses off the web, via programs, will not have real email addresses in their database. Anti-Spam causes problems be ...

www.projecthoneypot.org

The Web's Largest Community Tracking Online Fraud & Abuse. A free, distributed, open-source project to help website administrators track, stop, and prosecute spam harvesters stealing email addresses from their sites.