error en postfix

[alexcorvis]

Apr 12 19:37:18 noc authdaemond: Installation complete: authuserdb
Apr 12 19:37:18 noc authdaemond: Installing libauthpam
Apr 12 19:37:18 noc authdaemond: Installation complete: authpam
Apr 12 19:37:18 noc postfix/master[3268]: daemon started -- version 2.5.5, configuration /etc/postfix
Apr 12 19:37:23 noc postfix/smtpd[3557]: warning: 187.155.25.48: hostname dsl-187-155-25-48-dyn.prod-infinitum.com.mx verification failed: Name or service not known
Apr 12 19:37:23 noc postfix/smtpd[3557]: connect from unknown[187.155.25.48]
Apr 12 19:37:23 noc postfix/smtpd[3557]: warning: unknown[187.155.25.48]: SASL NTLM authentication aborted
Apr 12 19:37:24 noc postfix/smtpd[3557]: warning: SASL authentication failure: required parameters missing
Apr 12 19:37:24 noc postfix/master[3268]: warning: process /usr/lib/postfix/smtpd pid 3557 killed by signal 11
Apr 12 19:37:24 noc postfix/master[3268]: warning: /usr/lib/postfix/smtpd: bad command startup -- throttling
Apr 12 19:42:20 noc postfix/smtp[16315]: 8618DBBA8D23: host smtp.secureserver.ne t[216.69.186.201] refused to talk to me: 554-m1pismtp01-011.prod.mesa1.secureser ver.net 554 Your access to this mail system has been rejected due to the sending MTA's poor reputation. If you believe that this failure is in error, please con tact the intended recipient via alternate means.
Apr 12 19:42:20 noc postfix/smtp[16313]: 8618DBBA8D23: host smtp2.prodigy.net.mx [148.235.52.40] refused to talk to me: 554 - smtp.prodigy.net.mx -- Server
Apr 12 19:42:20 noc postfix/smtp[16313]: 8618DBBA8D23: host smtp4.prodigy.net.mx [148.235.52.59] refused to talk to me: 554 - smtp.prodigy.net.mx -- Server
Apr 12 19:42:21 noc postfix/smtp[16313]: 8618DBBA8D23: to=<ateneo@prodigy.net.mx >, relay=smtp4.prodigy.net.mx[148.235.52.13]:25, delay=293827, delays=293824/1.3 /1.4/0, dsn=4.0.0, status=deferred (host smtp4.prodigy.net.mx[148.235.52.13] ref used to talk to me: 554 - smtp.prodigy.net.mx -- Server)
Apr 12 19:42:21 noc postfix/smtp[16313]: 8618DBBA8D23: to=<educreamerida@prodigy .net.mx>, relay=smtp4.prodigy.net.mx[148.235.52.13]:25, delay=293827, delays=293 824/1.3/1.4/0, dsn=4.0.0, status=deferred (host smtp4.prodigy.net.mx[148.235.52. 13] refused to talk to me: 554 - smtp.prodigy.net.mx -- Server)
Apr 12 19:42:21 noc postfix/smtp[16313]: 8618DBBA8D23: to=<hikids@prodigy.net.mx >, relay=smtp4.prodigy.net.mx[148.235.52.13]:25, delay=293827, delays=293824/1.3 /1.4/0, dsn=4.0.0, status=deferred (host smtp4.prodigy.net.mx[148.235.52.13] ref used to talk to me: 554 - smtp.prodigy.net.mx -- Server)
Apr 12 19:42:21 noc postfix/smtp[16313]: 8618DBBA8D23: to=<visam@prodigy.net.mx> , relay=smtp4.prodigy.net.mx[148.235.52.13]:25, delay=293827, delays=293824/1.3/ 1.4/0, dsn=4.0.0, status=deferred (host smtp4.prodigy.net.mx[148.235.52.13] refu sed to talk to me: 554 - smtp.prodigy.net.mx -- Server)
Apr 12 19:42:23 noc postfix/smtp[16315]: 8618DBBA8D23: to=<info@renacimiento.edu .mx>, relay=mailstore1.secureserver.net[72.167.238.201]:25, delay=293829, delays =293824/1.3/4.1/0, dsn=4.0.0, status=deferred (host mailstore1.secureserver.net[ 72.167.238.201] refused to talk to me: 554-p3pismtp01-006.prod.phx3.secureserver .net 554 Your access to this mail system has been rejected due to the sending MT A's poor reputation. If you believe that this failure is in error, please contac t the intended recipient via alternate means.)

alguien que me pueda guiar con este problema y sobre el poor reputation verificando mi ip en mxtoolbox no aparesco en ninguna lista.