mml-signencrypt-style-alist

mml-signencrypt-style-alist is a variable defined in `mml-sec.el'.
Its value is

(("smime" separate)
 ("pgp" combined)
 ("pgpauto" combined)
 ("pgpmime" combined))

Documentation:
Alist specifying if `signencrypt' results in two separate operations or not.
The first entry indicates the MML security type, valid entries include
the strings "smime", "pgp", and "pgpmime". The second entry is
a symbol `separate' or `combined' where `separate' means that MML signs
and encrypt messages in a two step process, and `combined' means that MML
signs and encrypt the message in one step.

Note that the output generated by using a `combined' mode is NOT
understood by all PGP implementations, in particular PGP version
2 does not support it! See Info node `(message)Security' for
details.

You can customize this variable.

This variable was introduced, or its default value was changed, in version 22.1 of Emacs.