Sendmail and Outlook

[Tonny PerezCarbajal <hpatito yahoo com>]

hi, i just have installed sendmail, squirelmail over RedHat Enterprise 2.1,,,
the email works perfectly qhen i use squirrelmail (web)to send receive.. but i tried to use Outlook (my users lito to use outlook) .the problem is that i can receive mail form my.domain.com and from yahoo,hotmail,etc, from anywhere. But i only can send Mail to mail account from my.domai.com, whe i tried to send mail to another.domain.com (for example) outlook send back to me the next message>:

" The message could not be sent because one of the recipients was rejected by the server. The rejected e-mail address was 'tonnycar yahoo com'. Subject 'fgd', Account: 'mail.stj.gob.mx', Server: '148.235.57.178', Protocol: SMTP, Server Response: '550 5.7.1 <tonnycar yahoo com>... Relaying denied. IP name lookup failed [148.235.57.185]', Port: 25, Secure(SSL): No, Server Error: 550, Error Number: 0x800CCC79"

 

 

I edit the sendmail.cf file on the line:

 

# SMTP daemon options
O DaemonPortOptions=Name=MTA, Addr=Ip.Address.myserver
O DaemonPortOptions=Port=587, Name=MSA, M=E

 

also edit the access file..

permit Relay from  all my networks.

 

if you can give me some clue to where do i have to make some modifications...

or where i can find  some howto...

 

i also use a macafe webshield and i permit relay from all my networks too.

 

 

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