If your server is running Windows, I don't know.
If it's Linux, then get a shell prompt as the root user and look for the email address in the maillog:
Code:
# grep someone@someplace.ca /var/log/maillog
That will give you something like this:
Code:
Jan 9 11:43:15 myhost postfix/pickup[18170]: 6CDABDFB86: uid=530 from=<me2>
Jan 9 11:43:15 myhost postfix/qmgr[2264]: 6CDABDFB86: from=<someone@someplace.ca>, size=461, nrcpt=1 (queue active)
Jan 9 11:43:17 myhost postfix/smtp[19632]: 6CDABDFB86: to=<someone@someplace.ca>, relay=ASPMX.L.GOOGLE.com[192.168.1.27]:25, delay=1.9, delays=0.05/0.15/0.86/0.83, dsn=2.0.0, status=sent (250 2.0.0 OK 1389296597 hj7si6834300qeb.2 - gsmtp)
That big hexadecimal number is a system id for the message being sent. Now look for that in the log to see all entries associated with sending that message:
Code:
# grep 6CDABDFB86 /var/log/maillog
Jan 9 11:43:15 myhost postfix/pickup[18170]: 6CDABDFB86: uid=530 from=<me2>
Jan 9 11:43:15 myhost postfix/cleanup[19630]: 6CDABDFB86: message-id=<20140109194315.6CDABDFB86@myhost.mydomain.net>
Jan 9 11:43:15 myhost postfix/qmgr[2264]: 6CDABDFB86: from=<me2@myhost.mydomain.net>, size=461, nrcpt=1 (queue active)
Jan 9 11:43:17 myhost postfix/smtp[19632]: 6CDABDFB86: to=<someone@someplace.ca>, relay=ASPMX.L.GOOGLE.com[192.168.1.27]:25, delay=1.9, delays=0.05/0.15/0.86/0.83, dsn=2.0.0, status=sent (250 2.0.0 OK 1389296597 hj7si6834300qeb.2 - gsmtp)
Jan 9 11:43:17 myhost postfix/bounce[19633]: 6CDABDFB86: sender delivery status notification: 7553DDFB8F
Jan 9 11:43:17 myhost postfix/qmgr[2264]: 6CDABDFB86: removed
You can use sudo instead of being root if you want.
Of course, you can always test the email address by just sending email to the person with your regular mail client and see if they get it.