[Dovecot] mail size needed in dovecot sieve log line

This is a dovecot sieve log line:

2012-09-26T13:47:52+02:00 host/192.168.1.1 dovecot: [ID 583609 mail.info] lmtp(7565, user@domain): vTtJDTrrYlCNHQAAs1WjhA: sieve: msgid=<MSGID>: stored mail into mailbox 'INBOX'

Would it be possible to have mail size logged here?

MU