@c This is indexed in mule.texi, node "Recognize Coding".
@c @vindex sendmail-coding-system
- When you send a message that contains non-ASCII characters, they need
+ When you send a message that contains non-@acronym{ASCII} characters, they need
to be encoded with a coding system (@pxref{Coding Systems}). Usually
the coding system is specified automatically by your chosen language
environment (@pxref{Language Environments}). You can explicitly specify