postfix/local\[.*\]: warning: unable to create lock file /var/mail/[[:alnum:]]+\.lock: Permission denied
postfix/smtp\[.*\]: .*: to=<.*>, relay=none, delay=[[:digit:]]+, status=deferred \(connect to .*\[[\.[:digit:]]+\]: (Connection refused|server refused mail service)\)
postfix/smtp\[.*\]: .*: to=<.*>, relay=.*\[[\.[:digit:]]+\], delay=[[:digit:]]+, status=deferred \(host .*\[[\.[:digit:]]+\] said: 450 <.*>: Sender address rejected: Domain not found\)
postfix/smtp\[.*\]: connect to .*\[[\.[:digit:]]+\]: (Connection refused|server refused mail service) \(port 25\)
postfix/smtpd\[.*\]: reject: RCPT from .*\[[\.[:digit:]]+\]: 554 Service unavailable; .* blocked using .*; from=<.*> to=<.*>
postfix/smtpd\[.*\]: reject: RCPT from .*\[[\.[:digit:]]+\]: 554 <.*>: Recipient address rejected: (A|Relay a)ccess denied; from=<.*> to=<.*>
postfix/smtpd\[.*\]: warning: .*: hostname .* verification failed: Host (name has no address|not found)