#grep "bkinnaman@gmail.com" /var/log/maillog
Oct  4 12:56:14 server postfix/smtp[165030]: 92EBD21B4436: to=<bkinnaman@gmail.com>, relay=us-smtp-inbound-1.mimecast.com[205.139.110.141]:25, delay=10, delays=0.1/0/2.7/7.5, dsn=2.0.0, status=sent (250 SmtpThread-29149994-1507136156344@us-mta-112.us.mimecast.lan Received OK)
Oct  4 12:56:14 server postfix/smtp[165030]: 92EBD21B4436: to=<bkinnaman@gmail.com>, relay=us-smtp-inbound-1.mimecast.com[205.139.110.141]:25, delay=10, delays=0.1/0/2.7/7.5, dsn=2.0.0, status=sent (250 SmtpThread-29149994-1507136156344@us-mta-112.us.mimecast.lan Received OK)