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the total error is below when i am sending mail through exim

  <= root@ U=root P=local S=345
[root@localhost ~]# delivering 1QoU2R-0001ox-L0
T: remote_smtp for
Connecting to []:25 ... failed: Connection timed out (timeout=5m)
LOG: MAIN [] Connection timed out
  == may@gmail R=dnslookup T=remote_smtp defer (110): Connection timed out
  ** retry timeout exceeded
  Error while reading message with no usable sender address (R=1QoU2R-0001ox-L0): at least one malformed recipient address: root@ - domain missing or malformed
  Process failed (1) when writing error message to root@ (frozen)
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This is basically a respin of… where user90168 is just answer shopping. – user48838 Aug 3 '11 at 7:30
I think it's a different question, but it's no better than the other one. – womble Aug 3 '11 at 8:01

It says you are trying to connect to (which has an ESMTP server listening on port 25) and the attempt is timing out. This isn't usually a problem with the mail server's configuration, most likely it's network related. If this command fails, then it's network related (otherwise, I don't know what's wrong)

telnet 25

If it only says Trying, then it's probably one of the following problems:

  • For some reason, isn't listening to port 25 when you tried to send mail (note that when I did an mx lookup for, that IP didn't show up as one of their mail exchanges)
  • Something between you and is broken and you're not able to connect
  • Something you've set up locally is blocking your attempt to connect.

The first two is something out of your control, but the local issue may be firewall settings, maybe your router, etc. It's also possible your upstream provider is blocking outgoing connections to port 25.

The other error message is probably because you're sending an email with an envelope sender of root@ (no domain).

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It"s showing telnet 25 Trying telnet: connect to address Connection timed out telnet: Unable to connect to remote host: Connection timed out – user90168 Aug 3 '11 at 9:08
Then it seems to be a network problem and not exim. I've just now connected to, port 25 so it's not the first item. If you can ping then it's probably your provider blocking you or something local (maybe your firewall?) – Jon Lin Aug 3 '11 at 9:35
Yes I am able to ping with [root@localhost ~]# ping PING ( 56(84) bytes of data. 64 bytes from icmp_seq=1 ttl=45 time=251 ms 64 bytes from icmp_seq=2 ttl=45 time=253 ms 64 bytes from icmp_seq=3 ttl=44 time=252 ms 64 bytes from icmp_seq=4 ttl=44 time=265 ms 64 bytes from icmp_seq=5 ttl=44 time=252 ms – user90168 Aug 3 '11 at 10:36
Thanks for help now my mail server is working – user90168 Aug 3 '11 at 11:42

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