Hello there,
I've wroting a script "filter_postfix_SASL_fail_dmn.sh" for notifying me if a SALS login failure was found:
#!/bin/sh
# Postfix SASL fail
tail -fn0 /var/log/maillog | while read line ; do
stamp=`grep "SASL PLAIN authentication failed" /var/log/maillog | tail -n 1 | cut -d ' ' -f...