Postfix problem
 

Hi,
I'm newbie for Linux and managing mail server in our company. recently i have got some issue with mail server,Unable to send mail to Yahoo domain but some few mails are moving to yahoo domain. here i'm posting my mail logs for yahoo domain.

Dec 30 04:25:20 mail postfix/qmgr[16229]: 3DAC81B8ACF: from=<ravindran@xxx.co.in>, size=1045, nrcpt=8 (queue active)
Dec 30 04:26:09 mail postfix/qmgr[16229]: 3DAC81B8ACF: to=<mara.lou18@yahoo.com>, relay=none, delay=2308968, delays=2308919/49/0/0, dsn=4.4.2, status=deferred (delivery temporarily suspended: lost connection with mta6.am0.yahoodns.net[98.136.216.26] while sending end of data -- message may be sent more than once)
Dec 30 04:26:09 mail postfix/qmgr[16229]: 3DAC81B8ACF: to=<maral_mahshar@yahoo.com>, relay=none, delay=2308968, delays=2308919/49/0/0, dsn=4.4.2, status=deferred (delivery temporarily suspended: lost connection with mta6.am0.yahoodns.net[98.136.216.26] while sending end of data -- message may be sent more than once)
Dec 30 04:26:09 mail postfix/qmgr[16229]: 3DAC81B8ACF: to=<maralmazlom@yahoo.com>, relay=none, delay=2308968, delays=2308919/49/0/0, dsn=4.4.2, status=deferred (delivery temporarily suspended: lost connection with mta6.am0.yahoodns.net[98.136.216.26] while sending end of data -- message may be sent more than once)
Dec 30 04:26:09 mail postfix/qmgr[16229]: 3DAC81B8ACF: to=<maraloco69@yahoo.com>, relay=none, delay=2308968, delays=2308919/49/0/0, dsn=4.4.2, status=deferred (delivery temporarily suspended: lost connection with mta6.am0.yahoodns.net[98.136.216.26] while sending end of data -- message may be sent more than once)
Dec 30 04:50:19 mail postfix/qmgr[16229]: 3DAC81B8ACF: from=<ravindran@xxx.co.in>, size=1045, nrcpt=8 (queue active)

Please any one help me to resolve this issue.

--
Chidhambaram.

As per your logs, it seems that you have lost the connectivity on remote server.

Please try to telnet the remote IP

# telnet 98.136.216.26 25

and also check the DNS entries or firewall setting if there is any change.

If it is possible then please post the output of mailq command.

Thanks for reply.

telnet is connecting and my resolve.conf file is
cat /etc/resolv.conf
nameserver 208.67.222.222
nameserver 208.67.220.220
nameserver 202.54.12.164
nameserver 202.54.29.5

#mailq

2ADE6118C11 1041 Tue Dec 18 13:25:14 ravindran@xxx.co.in
(delivery temporarily suspended: lost connection with mta6.am0.yahoodns.net[98.138.112.38] while sending end of data -- message may be sent more than once)
boronzy204@yahoo.com
frankngoe2@yahoo.com
mrwrench768@yahoo.com
(delivery temporarily suspended: connect to yahoo.co[67.215.65.132]: Connection timed out)
rotensoul@yahoo.co


245A5119940 974 Fri Dec 14 14:05:50 ravindran@xxx.co.in
(delivery temporarily suspended: lost connection with mta6.am0.yahoodns.net[98.138.112.38] while sending end of data -- message may be sent more than once)
mfreelen68@yahoo.com

Looks like a spam dictionary attack. Yahoo is probably dropping the connections.