- ^\w{3} [ :[:digit:]]{11} [._[:alnum:]-]+ postfix/smtpd?\[[[:digit:]]+\]: warning: hostname .+ does not resolve to address .+(: Name or service not known)?$
- ^\w{3} [ :[:digit:]]{11} [._[:alnum:]-]+ postfix/smtpd?\[[[:digit:]]+\]: (Anonymous|(Unt|T)rusted) TLS connection established (to|from) [-\.[:alnum:]]+\[[:\.[:xdigit:]]+\]:([[:digit:]]+:)? TLSv[\.[:digit:]]+ with cipher [-[:alnum:]]+ \([[:digit:]]+/[[:digit:]]+ bits\)$
- ^\w{3} [ :[:digit:]]{11} [._[:alnum:]-]+ postfix/smtpd\[[[:digit:]]+\]: SSL_accept error from [-\.[:alnum:]]+\[[:\.[:xdigit:]]+\]:([[:digit:]]+:)? (lost connection|Connection timed out|Connection reset by peer|Broken pipe)$
- ^\w{3} [ :[:digit:]]{11} [._[:alnum:]-]+ postfix/smtpd\[[[:digit:]]+\]: improper command pipelining after (AUTH|QUIT|HELO) from [-\.[:alnum:]]+\[[:\.[:xdigit:]]+\]: QUIT\\r\\n$
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