body_timeout — network timeout once the DATA phase is complete
Body_Timeout = 600
The amount of time in seconds to wait for a response once the
DATA phase has been terminated by a
CRLF.CRLF. This timeout is relatively long because this is the only phase of transmission which involves significant network transmission. This option applies to outbound mail only. The default value for this option is
body_timeout is valid in the binding, binding_group, domain and global scopes.