This file is the equivalent of .mailrc for the elm electronic mail system. Modifying that file with an editor allows a whole range of customization, except the setting up of aliases. Aliases are set up within elm itself.
If the file does not exist, invoke elm and call the options menu (press ``o"). Make a change, and save it. The file will be created.
The file is self-explanatory. Samples taken from elmrc include:
# what editor to use ("none" means simulate Berkeley Mail)
editor = vi
# The full user name for outbound mail
fullname = Claude P. Cantin
# local ".signature" file to append to appropriate messages...
localsignature = .lsignature
# remote ".signature" file to append to appropriate messages...
remotesignature = .rsignature
# automatically copy message being replied to into buffer?
autocopy = ON
# save a copy of all outbound messages?
copy = ON