Bernard Rey said:
Checi in the preferences that your encodings setting is
on "MIME/Base64" and compression on "No". That's the usual
answers.
Additionally: Entourage, has this to say in Help:
About attachment encodings
When you choose an encoding format, it is helpful to understand how
Macintosh files differ from files created on other computers. Macintosh
files include additional resource information that files created on other
types of computers do not. If you are sending a data file, such as a
Microsoft Word document or Microsoft Excel spreadsheet, such resource
information may not be necessary. However, if you are sending something more
complex, such as a program, to another Macintosh computer, you must choose
an encoding format that preserves all the data.
The AppleDouble encoding format preserves the additional resource
information, and can be read by both Macintosh and other types of computers.
AppleDouble is a good choice for your default encoding format; it works most
of the time with most computers. However, if AppleDouble fails, you can
choose a different encoding format depending on the type of computer you are
sending the attachment to:
€ To send an attachment to a Macintosh computer, use BinHex, which
preserves the Macintosh resource information and data.
€ To send an attachment to a Windows-based computer, use MIME/Base 64,
which preserves the data only.
€ To send an attachment to a UNIX computer, use UUEncode, which preserves
the data only.
