1 Topic by pablosammy

  • pablosammy
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  • Registered: 2013-11-12
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Topic: no route to host - Cannot send e-mail

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====I am using Linux Centos 6.4 as my email server and currently having problems.

I can send emails to my own domain but cannot send to other domains. I can receive emails from my domain and from other domains without any problems. The error specified in the mailq is "no route to host".

Below is the error:
Nov 12 09:06:35 sulat postfix/smtp[15931]: connect to mta5.am0.yahoodns.net[66.196.118.35]:25: No route to host
Nov 12 09:06:35 sulat postfix/smtp[15931]: EDD442A0D70: to=<utopia_advertising@yahoo.com>, relay=none, delay=109, delays=1.2/0/108/0, dsn=4.4.1, status=deferred (connect to mta5.am0.yahoodns.net[66.196.118.35]:25: No route to host)
Nov 12 09:06:47 sulat postfix/smtp[16410]: connect to mta7.am0.yahoodns.net[98.138.112.35]:25: No route to host

Attached is my main.cf.

I hope someone could help me solve this problem.

Thanks in advance.

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2 Reply by camel1cz

  • camel1cz
  • camel1cz
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  • From: Czech Republic
  • Registered: 2013-04-20
  • Posts: 220

Re: no route to host - Cannot send e-mail

This is network related problem / don't look in postfix configuration but in the network config.

You need first make sure, you can reach internet from the mailserver host.

* my bet is wrong setting of gateway as your DNS is still reachable