# grep yahoo /var/log/maillog
Apr 25 08:04:51 zerver postfix/smtpd[24278]: connect from n12.bullet.mail.ac4.yahoo.com[74.6.228.92]

Apr 25 08:04:51 zerver postfix/smtpd[24278]: NOQUEUE: reject: RCPT from n12.bullet.mail.ac4.yahoo.com[74.6.228.92]: 550 5.1.1 <marshaglen@familiesfirstinc.net>: Recipient address rejected: familiesfirstinc.net; from=<mj63632000@yahoo.com> to=<marshaglen@familiesfirstinc.net> proto=SMTP helo=<n12.bullet.mail.ac4.yahoo.com>

Apr 25 08:04:51 zerver postfix/smtpd[24278]: disconnect from n12.bullet.mail.ac4.yahoo.com[74.6.228.92]

Apr 25 10:16:51 zerver postfix/smtpd[22262]: NOQUEUE: reject: RCPT from unknown[190.128.33.201]: 550 5.1.1 <chriscornwell@familiesfirstinc.net>: Recipient address rejected: familiesfirstinc.net; from=<chrisfosterlynn@yahoo.com> to=<chriscornwell@familiesfirstinc.net> proto=ESMTP helo=<ESCRITORIO-JAT>

Apr 25 10:27:35 zerver postfix/smtp[28334]: 63D0E5F8729: to=<todd50314@yahoo.com>, relay=127.0.0.1[127.0.0.1]:10024, delay=0.41, delays=0.05/0/0/0.36, dsn=2.0.0, status=sent (250 2.0.0 Ok: queued as BA3415F872A)

Apr 25 10:27:36 zerver postfix/smtp[29632]: BA3415F872A: to=<todd50314@yahoo.com>, relay=e.mx.mail.yahoo.com[67.195.168.230]:25, delay=0.58, delays=0.01/0.01/0.15/0.41, dsn=2.0.0, status=sent (250 ok dirdel)

Apr 25 10:34:43 zerver postfix/smtpd[1837]: NOQUEUE: reject: RCPT from host86-160-217-127.range86-160.btcentralplus.com[86.160.217.127]: 550 5.1.1

<chriscornwell@familiesfirstinc.net>: Recipient address rejected: familiesfirstinc.net; from=<chrisbusterchrisg@yahoo.com> to=<chriscornwell@familiesfirstinc.net> proto=ESMTP helo=<user-59abf8eded>