Sieve body needed MTA option

Sieve filter MTA options:  (0 or 1)
MIME message analysis is only performed when necessary and only retains necessary information. However, the serial nature of MTA operations means that subsequent operations may require additional information, forcing the MTA to analyze the message multiple times.

The  MTA option controls whether or not MIME body content information is retained on the first message analysis pass, even if the information is not needed immediately. Note that this information is only used by Sieve body tests. A setting of 1 causes the information to be retained, 0 causes it to be discarded. The default is 0.

Saving this information may avoid having to perform another analysis pass. On the other hand, saving the information consumes considerable memory and is wasteful when no sieve body tests are being performed.

See also:
 * sieve_body_needed MTA Option