Cannot send email using openSMTPD

Cannot send email using openSMTPD

Dear Team,

I am setting up a new server using opnSMTPD MTA to act as a local mail delivery and relay to Zoho mail but I am unable to send out any email using Zoho mail.
I have done some test with Google Gmail and it worked OK then, which indicate that the problem is with zohomail..

Could you please tell me if you block servers from sending out email?

Bellow are the errors that I get
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Jun 19 08:02:46 trinity smtpd[670]: smtp-out: Connecting to tls://74.201.154.90:587 (74.201.154.90) on session da15b12582cb6946...
Jun 19 08:02:46 trinity smtpd[670]: smtp-out: Connected on session da15b12582cb6946
Jun 19 08:02:47 trinity smtpd[670]: smtp-out: Started TLS on session da15b12582cb6946: version=TLSv1/SSLv3, cipher=AES128-SHA, bits=128
Jun 19 08:02:47 trinity smtpd[670]: smtp-out: Server certificate verification succeeded on session da15b12582cb6946
Jun 19 08:02:47 trinity smtpd[670]: smtp-out: Error on session da15b12582cb6946: AUTH rejected: 535 Authentication Failed
Jun 19 08:02:47 trinity smtpd[670]: smtp-out: Disabling route [] <-> 74.201.154.90 (74.201.154.90) for 800s
Jun 19 08:02:47 trinity smtpd[670]: smtp-out: No valid route for [connector:[]->[relay:smtp.zoho.com,port=587,starttls,auth=secrets:label,mx],0x0]
Jun 19 08:02:56 trinity smtpd[670]: relay: TempFail for 11bb1e9c72219b7f: session=0000000000000000, from=<>, to=< smtp@trinitech.co.uk>, rcpt=< root@trinity.trinitech.co.uk>, source=-, relay=smtp.zoho.com, delay=1h11s, stat=Network error on destination MXs
Jun 19 08:02:56 trinity smtpd[670]: relay: TempFail for 0e7ee450535e4783: session=0000000000000000, from=<>, to=< smtp@trinitech.co.uk>, rcpt=< root@trinity.trinitech.co.uk>, source=-, relay=smtp.zoho.com, delay=1h9s, stat=Network error on destination MXs
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Attached are my my configuration files:

Thank yiu in advance for your help