-B
Specify message body type V8.1 and later
MIME support in V8 sendmail has
been coupled to ESMTP and the BODY parameter for the
MAIL command. The BODY parameter is passed through
as is to the delivery agent. Two special parameters
are internally recognized by
sendmail. They tell
sendmail that the message
body is either 7bit or 8bitmime. 7bit forces the high bit off. 8bitmime causes
sendmail to leave the high
bit unchanged. Both override any setting of the
SevenBitInput
option (SevenBitInput on page
1090).
When sendmail accepts a
connection with another site for incoming mail, it
has no way to determine from context whether it is
dealing with MIME mail. To override any configured
assumptions, you can use the -B command-line
switch:
-B 7BIT -B 8BITMIME
Case is unimportant (7BIT and 7bit both work). The 7bit causes the local
sendmail to tell the remote
sendmail (in ESMTP mode) that
the message body should have the high bit stripped
from every byte. Conversely, 8bitmime tells the
remote sendmail to preserve the
high bit of each byte.
The value given to this -B command line or received via the
BODY parameter is stored in the ${bodytype}
sendmail macro (${bodytype}
on page 808).
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