%i - total number of bytes read from client

%o - total number of bytes sent to client

%{fetch_hdr_count} - Number of mails with mail header data sent to

client

%{fetch_hdr_bytes} - Number of bytes with mail header data sent to

client

%{fetch_body_count} - Number of mails with mail body data sent to client

%{fetch_body_bytes} - Number of bytes with mail body data sent to client

%{deleted} - Number of mails where client added \Deleted flag

%{expunged} - Number of mails that client expunged

%{trashed} - Number of mails that client copied/moved to the

special_use=\Trash mailbox.

Any thoughts on what else would be useful?

Number of mails that have been \Seen ?

I have been running Dovecot with full debug logging so I am not aware if the same information is already available elsewhere in the log at production loglevel.

Paolo