qmail-tcpto - print TCP timeout table
qmail-tcpto
After an SMTP connection attempt times out, qmail-remote records the relevant IP address. If the same address fails again, qmail-remote assumes that further attempts will fail for at least another hour. qmail-tcpto prints qmail-remote's current list of time- outs. qmail-tcpto must be run either as root or with user id qmailr and group id qmail.
qmail-qread(8), qmail-remote(8)