columnt
ddist 
deferrals 
failures 
matchup
recipients 
rhosts 
rxdelay
senders
successes
suids
xqp 
xrecipient 
xsender
zddist 
zdeferrals 
zfailures 
zoverall
zrecipients 
zrhosts
zrxdelay 
zsenders 
zsendmail 
zsuccesses 
zsuids