Hi all,

My problem is on :

SunOS "MY_HOSTNAME" 5.7 Generic_106541-14 sun4u sparc SUNW,Ultra-60

I get the following message on the console login screen:

sendmail[23665]: MAA 23665: SYSERR: putoutmsg (NO-HOST): error on output channel sending "550 none...User unknown": I/O error.

Does anyone know which file should I check for that?

I went through /etc/mail directory and checked the "aliases" and the "main.cf".

Is there something that I should be looking in specific ?

Are there any log files to check any furter details ?

Cheers