It supports configuration now in devel version:
# Events to log. Default is all. #mail_log_events = delete undelete expunge copy mailbox_delete # Group events within a transaction to one line. #mail_log_group_events = # Available fields: uid, box, msgid, size, vsize # size and vsize are available only for expunge and copy events. #mail_log_fields = uid box msgid size
Without grouping you get pretty similar output than before:
Info: copy: uid=13, dest=Trash, msgid=20040702035043.7296C300DFC1A@asdf, size=789 Info: delete: uid=13, msgid=20040702035043.7296C300DFC1A@asdf Info: expunge: uid=13, msgid=20040702035043.7296C300DFC1A@asdf, size=789
With mail_log_group_events=yes you get output like this:
Info: copy: uids=15-17,24,26, dest=Trash, size=1534 Info: delete: uids=15-17,24,26 Info: expunge: uids=15-17,24,26, size=1534
The size is the summed size of all the messages. msgids aren't suppported.
"size" means physical message size, "vsize" means the virtual size with CR+LF linefeeds.
Does someone want something more?