Help reading logger

[gforsyth]

Dec 22 14:12:43 lindbergh postfix/smtpd[26092]: connect from web65608.mail.ac4.yahoo.com[ip]
Dec 22 14:12:43 lindbergh postfix/smtpd[26092]: 792DBA3D08E: client=web65608.mail.ac4.yahoo.com[ip]
Dec 22 14:12:43 lindbergh postfix/cleanup[7971]: 792DBA3D08E: message-id=<261112.47765.qm@web65608.mail.ac4.yahoo.com>
Dec 22 14:12:43 lindbergh postfix/qmgr[6936]: 792DBA3D08E: from=< user @yahoo.com>, size=3423, nrcpt=1 (queue active)
Dec 22 14:12:43 lindbergh amavis[12022]: (12022-08) ESMTP::10024 /opt/zimbra/data/amavisd/tmp/amavis-20081222T133110-12022: <user @yahoo.com> -> <user @ mydomain$
Dec 22 14:12:43 lindbergh amavis[12022]: (12022-08) Checking: qg9Du8t0OmpF [76.13.9.76] <user@yahoo.com> -> <user@mydomain.com>
Dec 22 14:12:43 lindbergh postfix/smtpd[26092]: disconnect from web65608.mail.ac4.yahoo.com[ip]
Dec 22 14:12:45 lindbergh postfix/smtpd[3662]: connect from localhost[127.0.0.1]
Dec 22 14:12:45 lindbergh postfix/smtpd[3662]: AC798A3D1AB: client=localhost[127.0.0.1]
Dec 22 14:12:45 lindbergh postfix/cleanup[7972]: AC798A3D1AB: message-id=<261112.47765.qm@web65608.mail.ac4.yahoo.com>
Dec 22 14:12:45 lindbergh postfix/smtpd[3662]: disconnect from localhost[127.0.0.1]
Dec 22 14:12:45 lindbergh postfix/qmgr[6936]: AC798A3D1AB: from=<user@yahoo.com>, size=4049, nrcpt=1 (queue active)
Dec 22 14:12:45 lindbergh amavis[12022]: (12022-08) FWD via SMTP: <user@yahoo.com> -> <user@mydomain.com>,BODY=7BIT 250 2.6.0 Ok, id=12022-08, from MTA([1$
Dec 22 14:12:45 lindbergh amavis[12022]: (12022-08) Passed CLEAN, [ip] [ip] <user@yahoo.com> -> <user@mydomain.com>, Message-ID: <26111$
Dec 22 14:12:45 lindbergh postfix/smtp[7977]: 792DBA3D08E: to=<user@mydomain.com>, relay=127.0.0.1[127.0.0.1]:10024, delay=2.5, delays=0.43/0/0/2.1, dsn=2.0.0, sta$
Dec 22 14:12:45 lindbergh postfix/qmgr[6936]: 792DBA3D08E: removed
Dec 22 14:12:46 lindbergh postfix/lmtp[3663]: AC798A3D1AB: to=<user@mydomain.com>, relay=lindbergh.mydomain.com[192.168.0.16]:7025, delay=0.49, delays=0.11/0/0.01/$
Dec 22 14:12:46 lindbergh postfix/qmgr[6936]: AC798A3D1AB: removed

The user said the e-mail never got to her.

Can anyone tell me what this means? Or refer me to a guide so I can learn the different postfix messages?

Thanks