- http://linux.die.net/man/1/nail
- https://sourceforge.net/projects/nail/ : Heirloom mailx (formerly known as “nail”) is intended provide the functionality of the POSIX mailx command with additional support for MIME messages, IMAP (including caching), POP3, SMTP, S/MIME, message threading/sorting, scoring, and filtering.
- https://en.wikipedia.org/wiki/mailx
- on my Synology NAS it is available as an IPKG package
- using this utility I can send out files from my NAS as e-mail attachments