Topic: Sorry,_I_wasn't_able_to_establish_an_SMTP_connection

[sureshande]

Hi,
I am running SME 6.0
I am getting this error message in qmail/current log file

_________________________________________
2005-03-03 17:24:00.740609500 info msg 114993: bytes 791 from <user@domain.com> qp 13306 uid 401
2005-03-03 17:24:00.820861500 starting delivery 16073: msg 114993 to remote user@yahoo.com
2005-03-03 17:24:00.820870500 status: local 0/10 remote 1/20
2005-03-03 17:24:01.010389500 delivery 16073: deferral: Sorry,_I_wasn't_able_to_establish_an_SMTP_connection._(#4.4.1)/
2005-03-03 17:24:01.010401500 status: local 0/10 remote 0/20
_________________________________________

I have tried telnet
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telnet mail.domain.com 25
220 gateway.domain.com mailfront ESMTP
mail from:user@domain.com
250 Sender accepted.
rcpt to:user@yahoo.com
250 Recipient accepted.
data
354 End your message with a period.
test.
.
250
_________________________________________

it seems to send
but I get the above error log in qmail/current and the user in yahoo never recieves the mail. Local domain mail users can send and receive mails. The only problem is with outside domains like yahoo, msn.....

I did not change anything.It suddenly started happening.It was working fine till now.

Any help?

thanks in advance
Suresh