This class stores message into outgoing spool (SPOOLDIR/bulk).
If the message has list context and
add_list_statistics attribute (the case it was spliced from Sympa::Spindle::ProcessDigest), updates statistics information of the list (with regular delivery, Sympa::Spindle::ToList will update it).
Sympa::Message, Sympa::Spindle, Sympa::Spool::Outgoing.
Sympa::Spindle::ToOutgoing appeared on Sympa 6.2.13.