signature EXIM_CONFIG = sig val aliases : string val aliasesDefault : string (* Paths to e-mail alias files. * The "default" version is for catch-alls. *) val reload : string (* Command-line to reload exim configuration *) val handleDomains : string (* File to which to write a comma-separate list of domains to handle mail for *) val aliasTo : string list (* Default nodes to which alias directives are applied *) end