cannot send email from Postfix to gmail
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@IT-ADMIN said:
@scottalanmiller said:
Does this line tell us anything...
Aug 20 15:59:20 localhost postfix/smtp[13618]: connect to smtp.gmail.com[2a00:1450:400c:c07::6c]:587: Network is unreachable
Maybe there is a network error here? Test that port with telnet.
can you explain what do you mean please
The error suggests that the network cannot connect. There is no reason (yet) to worry about email configurations or security. The error that you have is simply that there is no networking and the two systems are not talking. There is a real chance that the ports are blocked on your network.
Use telnet and see what happens...
telnet smtp.google.com 587 -
i run that command on my centOS box, it gives this
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looks like a DNS issue.
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i don't think that i have DNS issue cuz google.com was resolved successfully as shown on the above image
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You just need to add the DNS servers to the /etc/resolv.conf file.
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@scottalanmiller said:
You just need to add the DNS servers to the /etc/resolv.conf file.
i already add DNS servers (8.8.4.4 and 8.8.8.8) on my centos box, and you can see in the above image i can ping google.com, so there is no issue in my DNS setting
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Ping doesn't tell you that. Use nslookup and see what the result of this is...
nslookup smtp.google.com -
@IT-ADMIN said:
i already add DNS servers (8.8.4.4 and 8.8.8.8) on my centos box, and you can see in the above image i can ping google.com, so there is no issue in my DNS setting
No, smtp.google.com is not google.com. You have a DNS problem.
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what can i understand from the above result ??
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my DNS setting are :
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@IT-ADMIN said:
That means that you can't look up smtp.google.com. Most likely because your DNS is being hijacked. This is why we don't use ping to test DNS.
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@IT-ADMIN said:
my DNS setting are :
We can tell from the nslookup that you hit the right DNS server (8.8.8.8) but what we can't tell is why smtp.google.com does not exist for it. BUT if I look smtp.google.com up from here in Panama, Google DNS tells me that it does not exist either. Are you sure that the name is correct?
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@scottalanmiller said:
BUT if I look smtp.google.com up from here in Panama, Google DNS tells me that it does not exist either. Are you sure that the name is correct?
Bingo!
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@scottalanmiller said:
We can tell from the nslookup that you hit the right DNS server (8.8.8.8) but what we can't tell is why smtp.google.com does not exist for it. BUT if I look smtp.google.com up from here in Panama, Google DNS tells me that it does not exist either. Are you sure that the name is correct?
the name of what ???
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@IT-ADMIN said:
the name of what ???
The server that you are trying to reach. The only name you have here: smtp.google.com
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Google suggests that you use this name: smtp-relay.gmail.com
