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Find existing email addresses by nickname using API/SMTP checking methods without user notification. Please, don't hesitate to improve cat's job! πŸ±πŸ”Ž πŸ“¬

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sharsil/mailcat

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mailcat


The only cat who can find existing email addresses by nickname.

Usage

First install requirements:

pip3 install -r requirements.txt

Then just run the script:

./mailcat.py username

It's recommended to run script through Tor or proxy. You can use internal Tor routing (--tor) or proxychains. Examples:

./mailcat.py --tor username
proxychains4 -q python3 mailcat.py username

./mailcat.py username --proxy http://1.2.3.4:8080

Supported providers

Total 37 providers, > 170 domains and > 100 aliases.

Name Domains Method
Gmail gmail.com SMTP
Yandex yandex.ru + 5 aliases SMTP
Protonmail protonmail.com + 2 aliases API
iCloud icloud.com, me.com, mac.com Access recovery
MailRu mail.ru + 4 other domains Registration
Rambler rambler.ru + 5 other domains Registration
Tutanota tutanota.com + 4 other domains Registration
Yahoo yahoo.com Registration
Outlook outlook.com, hotmail.com Registration
Zoho zohomail.com Registration
Lycos lycos.com Registration
Eclipso eclipso.eu + 9 other domains Registration
Posteo posteo.net + 50 aliases Registration
Mailbox.org mailbox.org Registration
Firemail firemail.de + 2 other domains Registration
Fastmail fastmail.com Registration
StartMail startmail.com Registration
KOLABNOW kolabnow.com + 23 aliases Registration
bigmir)net i.ua, ua.fm, email.ua Registration
Xmail xmail.net Registration
Ukrnet ukr.net Registration
Runbox runbox.com + 30 other domains Registration
DuckGo duck.com Registration
HushMail hushmail.com + 5 other domains Registration
CTemplar ctemplar.com Registration
emailn emailn.de Registration
aikq aikq.de + 40 other domains Registration
Vivaldi vivaldi.net Registration
mailDe mail.de SMTP
Wirtualna Polska wp.pl Registration
Gazeta.pl gazeta.pl Registration
int.pl int.pl Registration
O2 o2.pl Registration
Interia interia.pl + 10 other domains Password recovery
t.pl t.pl + 8 other domains Registration
onet.pl onet.pl + 11 other domains & 4 aliases Registration

Troubleshooting

Use -m or --max-connections if you get connection errors (Mailcat do 10 parallel connections max by default).

SOWEL classification

This tool uses the following OSINT techniques:

Mentions and articles

OSINTEditor Sunday Briefing: Sensational Headlines and Kuomintang Chairmanship Elections

Michael Buzzel: 237 - The Huge OSINT Show by The Privacy, Security, & OSINT Show

bellingcat: First Steps to Getting Started in Open Source Research

OS2INT verifying email addresses using Mailcat

hwosint - Twitter post