SPFtoolbox is an Open Source Javascript and PHP app to look up DNS records such as SPF, MX, Whois… SPFtoolbox is an Open Source Javascript and PHP app to look up DNS records such as SPF, MX, Whois.
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SPF Toolbox
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| # | Image | App Name | Features | Platforms | Price | Website Link |
| 1 |  |
MXAlerts | Web | Commercial | Website | |
| 2 |  |
W3dt.net | Web | Free | Website | |
| 3 |  |
MxToolBox | Web | Freemium | Website | |
| 4 |  |
Dnsstuff | Web | Freemium | Website | |
| 5 |  |
DNS Check | Web | Freemium | Website | |
| 6 |  |
isUp | Web | Free | Website |