sender verification for forwarded email

sender verification for forwarded email

I'm getting sender verification failed when forwarding email.

The DKIM and SPF is set for the zohohosteddomain.com

Any idea?

Bounceback Log

The following message could not be forwarded to emaildispatcher6@domainx.com for cs@zohohosteddomain.com 

Technical details of the failure: 
Verification failed for <cs+uml_=emaildispatcher6=domainx.com@zohohosteddomain.com> 
            Unrouteable address 
            Sender verify failed 

Exim Log

2019-01-30 09:32:04 H=sender-op-f32.zoho.com [135.84.80.207] sender verify fail for <cs+uml_=emaildispatcher6= domainx.com@zohohosteddomain.com>: Unrouteable address
2019-01-30 09:32:04 H=sender-op-f32.zoho.com [135.84.80.207] X=TLSv1.2:DHE-RSA-AES256-SHA256:256 CV=no F=<cs+uml_=emaildispatcher6= domainx.com@zohohosteddomain.com> rejected RCPT < emaildispatcher6@domainx.com>: Sender verify failed
2019-01-30 09:32:04 H=sender-op-f32.zoho.com [135.84.80.207] incomplete transaction (QUIT) from <cs+uml_=emaildispatcher6= domainx.com@zohohosteddomain.com>