-------------------- ~ ESCAPES ----------------------------
~~		Quote a single tilde
~a,~A		Autograph (insert 'sign' variable)
~b users	Add users to Bcc list
~c users	Add users to Cc list
~d		Read in dead.letter file
~e		Edit the message buffer
~f messages	Read in messages, do not right-shift
~h		Prompt for To list, Subject and Cc list
~i string	Insert string into message (~a := ~i sign)
~m messages	Read in messages, right-shifted by a tab
~p		Print the message buffer
~q,~Q		Quit, save letter in $HOME/dead.letter
~r file		Read a file into the message buffer
~s subject	Set subject
~t users	Add users to To list
~v		Invoke display editor on message
~w file		Write message onto file
~x		Quit, do not save letter
~< file		Read a file into the message buffer
~.		End of input
~!command	Run a shell command
~|command	Pipe the message through the command
~^command	Pipe the message through the command
~:command	Execute regular mailx command
~_command	Execute regular mailx command
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