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"SMTP server error: 5.5.2 Send hello first", Not able to send outbound mails

Question asked by rashmi.jeswani rashmi.jeswani on Jul 1, 2014
I am facing this error for quite sometime. I did a succesful campaign about a month back but not m not able to send test outbound mails using the exchange server. M not using SMTP authentication. Could this be due to LDAP??  I made some changes to enable LDAP for grinmark addin on outlook. Please help, m stuck with this issue for a long time already.