Packages and Binaries:

mxcheck

mxcheck is an info scanner for e-mail servers, checking:

- DNS records: A, MX, PTR, SPF, MTA-STS, DKIM, DMARC
- AS Number and AS Country
- The support of StartTLS and the certificate
- Open ports: 25, 465, 587
- If the service is listed by blacklists
- If it leaks information by server string and VRFY command
- If the server is an open relay

Installed size: 5.68 MB
How to install: sudo apt install mxcheck

mxcheck

root@kali:~# mxcheck -h

Usage of mxcheck:
  -b, --blacklist              Check if the service is on blacklists
  -S, --dkim-selector string   The DKIM selector. If set a DKIM check is performed on the provided service domain
  -d, --dnsserver string       The dns server to be requested (default "8.8.8.8")
  -f, --mailfrom string        Set the mailFrom address (default "[email protected]")
  -t, --mailto string          Set the mailTo address (default "[email protected]")
  -n, --no-prompt              Answer yes to all questions
  -s, --service string         The service host to check
  -u, --updatecheck            Check for new version of mxcheck
  -v, --version                Version and license
  -w, --write-tsv              Write tsv formated report to file