problem with sendmail, not sending mails to some mail servers like yahoo except gmail

[sasidhar prabhakar]

hi this is sasidhar,

we have CentOS5 with default sendmail configuration.
Initially it is sending mails to gmail, yahoo etc. last few days it is
not sending mails to yahoo.
In maillog I observed that for yahoo mails the stat value is deferred.
I tried everything by browsing google but I didn't find any solution
to this problem.
Finally I came here with lots of hope.

In mail queue there are more than 1 lack, most of them yahoo, rediff
etc. For gmail it is not giving any problem every mail is going.

please give any suggestions to solve this problem.

Thanks,
sasidhar.

[Mark Hansen]

Deferred is generally not a problem. As your queue runs (usually, once
an hour), it will try again (and again, as necessary).

You can force sendmail to run the queue by running it with the -q
command-line argument.

Hope this helps,

[Andrzej Adam Filip]

Push the queued messages in verbose mode (with SMTP session tracking)
to get more "hints".

As root execute:

sendmail -v -q...@yahoo.com

--
[pl>en Andrew] Andrzej Adam Filip : an...@onet.eu : Andrze...@gmail.com
Open-Sendmail: http://open-sendmail.sourceforge.net/
If love is the answer, could you rephrase the question?
-- Lily Tomlin

[sasidhar prabhakar]

thanks,
the problem is they are rejecting our mails permanently. because we
didn't implement dkim and some other they said.
Actually those mails sent by users only.
and they mentioned that if any user not present it is better not to
send mails again to that user.

anyway thanks for ur replies.
how to configure dkim and domainkeys.
Is this solves the problem.

thanks,
sasidhar.