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Apr 1, 2010

we have qmail server installed on rhl 9. it was working perfectly fine for last 1 year. suddenly it stopped accepting emails from internet. when i telnet on port 25 it takes about 90 secs to show the SMTP ready state.I have tried many things

1. stopped Reverse DNS Lookup by adding -H to qmail-smtpd/run file
2. stopped spamassing and AV
3. reverified DNS server settings in resolv.conf
4. dig is resolving dns query properly.

i also observed that when i do telnet to
telnet localhost 25 response is very quick

but when i do
telnet local_server_IP_address 25
it takes aprx 90 secs to show me SMTP ready messege.

can someone shed some light on this as what should i do next to rectify this problem..

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