-a, --append=HEADER: VALUE append given header to the message being sent

-e, --exist
       return true if mail exists

-E, --exec=COMMAND
       execute COMMAND

-F, --byname
       save messages according to sender

-H, --headers
       write a header summary and exit

-i, --ignore
       ignore interrupts

-n, --norc
       do not read the system mailrc file

-N, --nosum
       do not display initial header summary

-p, -r, --print, --read
       print all mail to standard output

-q, --quit
       cause interrupts to terminate program

-s, --subject=SUBJ
       send a message with the given SUBJECT

-t, --to
       precede message by a list of addresses

-u, --user=USER
       operate on USER's mailbox

--tls[=BOOL]
       enable TLS support

       Common options

--config-file=FILE, --rcfile=FILE
       load this configuration file

--config-help
       show configuration file summary

--config-lint, --rcfile-lint
       check configuration file syntax and exit

--config-verbose, --rcfile-verbose
       verbosely log parsing of the configuration files

--no-site-config, --no-site-rcfile
       do not load site configuration file

--no-user-config, --no-user-rcfile
       do not load user configuration file

--show-config-options
       show compilation options

       Global debugging settings

--debug-level=LEVEL
       set Mailutils debugging level

--debug-line-info
       show source info with debugging messages

--license
       print license and exit

-?, --help
       give this help list

--usage
       give a short usage message

-V, --version
       print program version