550 error while sending mail to an a/c in squirrellmail

Hi All

I am facing a peculiar issue. I have configured an account in squirrelmail. I can successfully send mail from that account but when try to reply those mails from other accounts then 550 error occurs. Below I am furnishing the exact error.

"This is an automatically generated Delivery Status Notification

Delivery to the following recipient failed permanently:

    delhi@...

Technical details of permanent failure:
Google tried to deliver your message, but it was rejected by the recipient domain. We recommend contacting the other email provider for further information about the cause of this error. The error that the other server returned was: 550 550 not local host thesafaricompanyindia.com, not a gateway (state 14).

  ----- Original message -----

MIME-Version: 1.0
Received: by 10.229.96.13 with SMTP id f13mr1499048qcn.36.
I am mailing from web interface not from outlook.

Please help


Thanks & Regards
----------------------
Kaushik Chatterjee
Senior System Admin
I2K2 Networks
Mob:-+919350853067

------------------------------------------------------------------------------
Crystal Reports - New Free Runtime and 30 Day Trial
Check out the new simplified licensing option that enables unlimited
royalty-free distribution of the report engine for externally facing
server and web deployment.
http://p.sf.net/sfu/businessobjects
-----
squirrelmail-users mailing list
Posting guidelines: http://squirrelmail.org/postingguidelines
List address: squirrelmail-users@...
List archives: http://news.gmane.org/gmane.mail.squirrelmail.user
List info (subscribe/unsubscribe/change options): https://lists.sourceforge.net/lists/listinfo/squirrelmail-users