cannot send email from Postfix to gmail
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@scottalanmiller said:
I have devices like this send to us through whitelisting. If you don't whitelist it, any commercial SPAM filter will normally catch it.
I too whitelist my internal devices for receiving/forwarding SMTP mail from these types of devices.
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@Dashrender said:
For example - why can't my Copy machine just send an email to any email server on the planet?
This line. in one breath you are asking why you can't. In the next you are saying that you can.
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When I host my own Postfix servers I can put in a lot of effort and get them to sometimes get mail accepted if I give each their own IP address, but it is not super reliable. Or I can send through our existing email infrastructure. But running each as its own is very problematic for reliable third party delivery.
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@Dashrender said:
Of course assuming I move to O365, then I will begin to have these problems.
Why would you assume that?
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anyone know how to solve this problem ??
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how can i inform my gmail account to allow postfix to use it as a relay ??
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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.
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@scottalanmiller said:
@Dashrender said:
Of course assuming I move to O365, then I will begin to have these problems.
Why would you assume that?
Because of posts like this. Of course we could get lucky and things like this might be working better.
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@Dashrender said:
Because of posts like this. Of course we could get lucky and things like this might be working better.
But this is about GMail. Did someone talk about Office 365, which is unrelated to Gmail.
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@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
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@scottalanmiller said:
@Dashrender said:
Because of posts like this. Of course we could get lucky and things like this might be working better.
But this is about GMail. Did someone talk about Office 365, which is unrelated to Gmail.
not in this thread, but I've seen other threads a long time ago talking about these types of problems.
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@Dashrender said:
not in this thread, but I've seen other threads a long time ago talking about these types of problems.
Lots of people having issues sending to plain Exchange too. But you don't get the impression that it doesn't work. You just have to set it up correctly. We do this, so there is no question that it works. And we send out through GMail. So there is no reason for suspicion different than any IT system that could be misconfigured.
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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
