Hi Winan,

Here is the error message:

*-----------------------------------
192.168.1.8 does not like recipient.
Remote host said: 554 ... Relay operation rejected
Giving up on 192.168.1.8.
*-----------------------------------

The problem may be that somewhere the message is being blocked because of to whom it is address (e.g. the remote host does not like the person to whom the email is address (e.g. the receipient).

Can 192.168.1.88 email to other addresses, or is all mail originating from 192.168.1.88 being rejected? Have you made any changes to your configuration without restarting sendmail?

Is it possible the qmail on 192.168.1.10 is not allowed to forward email to 192.168.1.8, if it originates from 198.168.1.88?

Have you configured sendmail to reject outgoing mail to certain recipients.

Regards,

LelandJ