Try to check kung yung mail server mo can pass thru the Firewall. Try to talk to 
yahoo's smtp

telnet mail.yahoo.com 25

Pag nag respond, then okay iyong rules ng FW. Try other known external smtp too.

Also, may logs ang sendmail. Maybe you can get more detailed error messages from there.

Ruel Masil wrote:

> naka-nslookup naman ako, i'm under a firewall btw.
>
> -----Original Message-----
> From: Glynn S. Condez [mailto:glynn@;makati.techsquare.com]
> Sent: Tuesday, November 05, 2002 6:11 PM
> To: [EMAIL PROTECTED]
> Subject: Re: [plug] help uli!!!
>
> From: "Ruel Masil" <[EMAIL PROTECTED]>
>
> > Masters,
> >
> > I have configured sendmail 8.12.5 on a linux 8.0. I can send and receive
> > emails. But my problem is when I send emails to host like yahoo or hotmail
> > or  other internet email servers I get a "host name
> > lookup(yahoo.com):deferred" and emails seems to stay at queue.
>
> your dns being broken? try an mx lookup from the command line to that
> domain,
> see if the said domain return an mx record.
>
> HTH
> glynn
>
> >
> > Thanks in advance.
> >
> >
> > :) bulatitoy
> >
> >
> >
> >
> > Ruel R. Masil
> > Network Administrator
> > Information Services Division
> > Berkley International Philippines, Inc.
> >   visit our website:
> >   www.myfamilyfirst.com
> >   www.berkley.com.ph
> >
> >
> > This message may contain privileged information. Recipients who are not
> the
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> > deliver it to any third party, nor to use or benefit from its contents in
> > any manner whatsoever. They should notify the sender through a reply
> e-mail
> > and destroy the message immediately upon receipt.  The sender shall not be
> > bound by any unauthorized copying, alteration, forwarding, delivery, or
> use
> > of any part of this message and shall not be responsible for the
> > consequences of any such act.
> > _
> > Philippine Linux Users Group. Web site and archives at
> http://plug.linux.org.ph
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> any manner whatsoever. They should notify the sender through a reply e-mail
> and destroy the message immediately upon receipt.  The sender shall not be
> bound by any unauthorized copying, alteration, forwarding, delivery, or use
> of any part of this message and shall not be responsible for the
> consequences of any such act.
> _
> Philippine Linux Users Group. Web site and archives at http://plug.linux.org.ph
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>
> Fully Searchable Archives With Friendly Web Interface at http://marc.free.net.ph
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