Something

Mar  8 18:09:26 nebula bash: HISTORY: PID=1616 UID=1000 tail -f /var/log/messages >> error.log
Mar  8 18:09:39 nebula postfix/pickup[15000]: 03CE1113C1C: uid=1000 from=<mehul.forums@gmail.com>
Mar  8 18:09:39 nebula postfix/cleanup[15290]: 03CE1113C1C: message-id=<20070308123938.GG11546@nebula>
Mar  8 18:09:39 nebula postfix/qmgr[15001]: 03CE1113C1C: from=<mehul.forums@gmail.com>, size=400, nrcpt=1 (queue active)
Mar  8 18:09:39 nebula postfix/smtp[15292]: warning: cannot get certificate from file /etc/postfix/FOO-cert.pem
Mar  8 18:09:39 nebula postfix/smtp[15292]: warning: TLS library problem: 15292:error:02001002:system library:fopen:No such file or directory:bss_file.c:352:fopen('/etc/postfix/FOO-cert.pem','r'):
Mar  8 18:09:39 nebula postfix/smtp[15292]: warning: TLS library problem: 15292:error:20074002:BIO routines:FILE_CTRL:system lib:bss_file.c:354:
Mar  8 18:09:39 nebula postfix/smtp[15292]: warning: TLS library problem: 15292:error:140DC002:SSL routines:SSL_CTX_use_certificate_chain_file:system lib:ssl_rsa.c:720:
Mar  8 18:09:39 nebula postfix/smtp[15292]: cannot load RSA certificate and key data
Mar  8 18:09:40 nebula postfix/smtp[15292]: 03CE1113C1C: TLS is required, but our TLS engine is unavailable
Mar  8 18:09:41 nebula postfix/smtp[15292]: 03CE1113C1C: to=<mehul.forums@gmail.com>, relay=smtp.gmail.com[66.249.83.111]:25, delay=2, delays=0.04/0.03/2/0, dsn=4.7.5, status=deferred (TLS is required, but our TLS engine is unavailable)