i am keeping getting an following error messages from one of my box...

Aug 4 15:35:20 qts-mailfwd01 zmmailboxdmgr[8678]: status OK
Aug 4 15:35:25 qts-mailfwd01 postfix/smtpd[7706]: connect from luna.ps.corp.easylink.com[10.40.40.10]
Aug 4 15:35:25 qts-mailfwd01 postfix/smtpd[7706]: disconnect from luna.ps.corp.easylink.com[10.40.40.10]
Aug 4 15:35:30 qts-mailfwd01 postfix/smtpd[7706]: connect from luna.ps.corp.easylink.com[10.40.40.10]
Aug 4 15:35:30 qts-mailfwd01 postfix/smtpd[7706]: disconnect from luna.ps.corp.easylink.com[10.40.40.10]
Aug 4 15:35:35 qts-mailfwd01 postfix/smtpd[7706]: connect from luna.ps.corp.easylink.com[10.40.40.10]
Aug 4 15:35:35 qts-mailfwd01 postfix/smtpd[7706]: disconnect from luna.ps.corp.easylink.com[10.40.40.10]
Aug 4 15:35:40 qts-mailfwd01 postfix/smtpd[7706]: connect from luna.ps.corp.easylink.com[10.40.40.10]
Aug 4 15:35:40 qts-mailfwd01 postfix/smtpd[7706]: disconnect from luna.ps.corp.easylink.com[10.40.40.10]
Aug 4 15:35:45 qts-mailfwd01 postfix/smtpd[7706]: connect from luna.ps.corp.easylink.com[10.40.40.10]
Aug 4 15:35:45 qts-mailfwd01 postfix/smtpd[7706]: disconnect from luna.ps.corp.easylink.com[10.40.40.10]
Aug 4 15:35:50 qts-mailfwd01 postfix/smtpd[7706]: connect from luna.ps.corp.easylink.com[10.40.40.10]
Aug 4 15:35:50 qts-mailfwd01 postfix/smtpd[7706]: disconnect from luna.ps.corp.easylink.com[10.40.40.10]
Aug 4 15:35:55 qts-mailfwd01 postfix/smtpd[7706]: connect from luna.ps.corp.easylink.com[10.40.40.10]
Aug 4 15:35:55 qts-mailfwd01 postfix/smtpd[7706]: disconnect from luna.ps.corp.easylink.com[10.40.40.10]
Aug 4 15:36:00 qts-mailfwd01 postfix/smtpd[7706]: connect from luna.ps.corp.easylink.com[10.40.40.10]
Aug 4 15:36:00 qts-mailfwd01 postfix/smtpd[7706]: disconnect from luna.ps.corp.easylink.com[10.40.40.10]
Aug 4 15:36:05 qts-mailfwd01 postfix/smtpd[7706]: connect from luna.ps.corp.easylink.com[10.40.40.10]
Aug 4 15:36:05 qts-mailfwd01 postfix/smtpd[7706]: disconnect from luna.ps.corp.easylink.com[10.40.40.10]
Aug 4 15:36:05 qts-mailfwd01 zmmailboxdmgr[9010]: status requested
Aug 4 15:36:05 qts-mailfwd01 zmmailboxdmgr[9010]: status OK
Aug 4 15:36:10 qts-mailfwd01 postfix/smtpd[7706]: connect from luna.ps.corp.easylink.com[10.40.40.10]
Aug 4 15:36:10 qts-mailfwd01 postfix/smtpd[7706]: disconnect from luna.ps.corp.easylink.com[10.40.40.10]
Aug 4 15:36:15 qts-mailfwd01 postfix/smtpd[7706]: connect from luna.ps.corp.easylink.com[10.40.40.10]
Aug 4 15:36:15 qts-mailfwd01 postfix/smtpd[7706]: disconnect from luna.ps.corp.easylink.com[10.40.40.10]
Aug 4 15:36:20 qts-mailfwd01 postfix/smtpd[7706]: connect from luna.ps.corp.easylink.com[10.40.40.10]
Aug 4 15:36:20 qts-mailfwd01 postfix/smtpd[7706]: disconnect from luna.ps.corp.easylink.com[10.40.40.10]
Aug 4 15:36:25 qts-mailfwd01 postfix/smtpd[7706]: connect from luna.ps.corp.easylink.com[10.40.40.10]
Aug 4 15:36:25 qts-mailfwd01 postfix/smtpd[7706]: disconnect from luna.ps.corp.easylink.com[10.40.40.10]