- Determine which email provider an org is using
	- `dig +short <email_domain> MX`0
- Send spoofed email
	- [Emkei's Mailer](https://emkei.cz/)
- Management
	-   [ActiveInbox](https://www.activeinboxhq.com/)
	-   [AutoHotkey](https://www.autohotkey.com/)
	-   [Batched Inbox](https://www.batchedinbox.com/)
	-   [Block Sender](https://chrome.google.com/webstore/detail/block-sender/bklnjbfcmglhiaoppcckdodanccbelcg)
	-   [Boomerang Mail](https://www.boomeranggmail.com/)
	-   [ClearContext](https://www.clearcontext.com/)
	-   [Cleanfox](https://www.cleanfox.io/)
	-   [CloudMagic](https://cloudmagic.com/)
	-   [FindBigMail](https://www.findbigmail.com/)
	-   [Followupthen](https://www.followupthen.com/)
	-   [Hiver](https://hiverhq.com/)
	-   [Integrated gmail](https://addons.mozilla.org/en-US/firefox/addon/integrated-gmail)
	-   [Mailstore](https://www.mailstore.com/)
	-   [Hubspotsales](https://chrome.google.com/webstore/detail/hubspot-sales/oiiaigjnkhngdbnoookogelabohpglmd?hl=en)
	-   [Minimalist](https://chrome.google.com/webstore/detail/minimalist-for-everything/bmihblnpomgpjkfddepdpdafhhepdbek)
	-   [NudgeMail](https://www.nudgemail.com/)
	-   [Sanebox](https://www.sanebox.com/)
	-   [Send for Gmail](https://chrome.google.com/webstore/detail/send-from-gmail-by-google/pgphcomnlaojlmmcjmiddhdapjpbgeoc)
	-   [Sortd](https://www.sortd.com/)
	-   [Ugly Email](https://uglyemail.com/)
	-   [Wisestamp](https://chrome.google.com/webstore/detail/wisestamp-email-signature/pbcgnkmbeodkmiijjfnliicelkjfcldg)

- Email Tools
	-   [Email Address Validator](https://www.email-validator.net/)
	-   [Email Format](https://email-format.com/)
	-   [EmailHippo](https://tools.verifyemailaddress.io/)
	-   [Email Hunter](https://emailhunter.co/)
	-   [Have I Been Pwned](https://haveibeenpwned.com/)
	-   [MailTester](https://mailtester.com/testmail.php)
	-   [Pipl](https://pipl.com/)
	-   [TCIPUTILS.com Email Test](https://www.tcpiputils.com/email-test)
	-   [ThatsThem](https://thatsthem.com/reverse-email-lookup)
	-   [Verify Email](https://verify-email.org/)
	-   [VoilaNorbert](https://www.voilanorbert.com/)