nail: nail (a simple mail client) nail: nail: Nail is a mail user agent derived from Berkeley Mail 8.1 and is nail: intended to provide the functionality of the POSIX.2 mailx command nail: with additional support for MIME messages, SSL/TLS, POP3 and SMTP. nail: nail: The maintainer and primary developer of nail is Gunnar Ritter. nail: nail: nail: nail: