grep user /usr/local/psa/var/log/maillog | grep LOGIN | cut -c50-140 | cut -d, -f 2 | cut -d@ -f 2 |sort|uniq -c|sort -nk 1
cat /usr/local/psa/var/log/maillog | grep -o 'to=.*@.*' | sed 's/to=.*@//' | sort | uniq -c | sort -rn | head
grep user /usr/local/psa/var/log/maillog | grep LOGIN | cut -c50-140 | cut -d, -f 3 | cut -d[ -f 2 | cut -d ] -f1 |sort | uniq -c | sort -nk 1