this is log which i am getting when try send mail using roundcube :
Feb 8 13:46:53 mail postfix/smtpd[15307]: connect from mail.valdentechnology.com[127.0.0.1]
Feb 8 13:46:54 mail postfix/smtpd[15307]: 4385D10E0488: client=mail.valdentechnology.com[127.0.0.1], sasl_method=LOGIN, sas$
Feb 8 13:46:55 mail postfix/cleanup[15312]: 4385D10E0488: message-id=<b54ed35c269fe4cd817f6329c2969fc9@rjproperties.in>
Feb 8 13:46:55 mail postfix/qmgr[1873]: 4385D10E0488: from=<info@rjproperties.in>, size=583, nrcpt=1 (queue active)
Feb 8 13:46:55 mail roundcube: User info@rjproperties.in [202.83.16.188]; Message for ashok4ashok@hotmail.com; 250: 2.0.0 O$
Feb 8 13:46:55 mail postfix/smtpd[15307]: disconnect from mail.valdentechnology.com[127.0.0.1]
Feb 8 13:46:56 mail postfix/smtpd[15320]: connect from mail.valdentechnology.com[127.0.0.1]
Feb 8 13:46:56 mail postfix/smtpd[15320]: 24E7210E10D0: client=mail.valdentechnology.com[127.0.0.1]
Feb 8 13:46:56 mail postfix/cleanup[15312]: 24E7210E10D0: message-id=<b54ed35c269fe4cd817f6329c2969fc9@rjproperties.in>
Feb 8 13:46:56 mail postfix/qmgr[1873]: 24E7210E10D0: from=<info@rjproperties.in>, size=1187, nrcpt=1 (queue active)
Feb 8 13:46:56 mail postfix/smtpd[15320]: disconnect from mail.valdentechnology.com[127.0.0.1]
Feb 8 13:46:56 mail amavis[1478]: (01478-05) Passed CLEAN, MYNETS/MYUSERS LOCAL [127.0.0.1] [127.0.0.1] <info@rjproperties.$
Feb 8 13:46:56 mail postfix/smtp[15314]: 4385D10E0488: to=<ashok4ashok@hotmail.com>, relay=127.0.0.1[127.0.0.1]:10024, dela$
Feb 8 13:46:56 mail postfix/qmgr[1873]: 4385D10E0488: removed
Feb 8 13:47:02 mail postfix/smtp[15321]: 24E7210E10D0: to=<ashok4ashok@hotmail.com>, relay=mx1.hotmail.com[65.55.37.104]:25$
Feb 8 13:47:02 mail postfix/qmgr[1873]: 24E7210E10D0: removed
we are not able to send mail from roundcube or outlook
Note : I am able to send / receive mail from my Blackberry mobile phone