mh-alias-insert-file

mh-alias-insert-file is a variable defined in `mh-e.el'.
Its value is

nil

Documentation:
*Filename used to store a new MH-E alias.

The default setting of this option is "Use Aliasfile Profile
Component". This option can also hold the name of a file or a
list a file names. If this option is set to a list of file names,
or the "Aliasfile:" profile component contains more than one file
name, MH-E will prompt for one of them when MH-E adds an alias.

You can customize this variable.

This variable was introduced, or its default value was changed, in version 7.1 of the MH-E package that is part of Emacs 22.1.