E-mail not working TrueNas 12.8

[SnapTech]

Totally new truenas user. I've followed the documentation on how to set it up but when I click the "Send Test E-mail"
button, I get this error message.

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Error: [EFAULT] Failed to send email: [Errno 8] Name does not resolve

What am I doing wrong?

 

[Redcoat]

Welcome to the forums!

Are you running Core or Scale?

Please post a screenshot of Network>Global Configuration.

To save the time of the potential next questions, please post the information requested in "Forum Rules" on the masthead or here at https://www.truenas.com/community/threads/forum-rules.45124/

 

[SnapTech]

Running Core. how do I take a screen shot?

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[SnapTech]

 

[Redcoat]

OK - You need to fill in your IPv4Default Gateway and DNS servers on the screen above.

Your default gateway is most likely the IP address of your router - maybe 192.168.50.1?

For DNS Nameservers - unless you know otherwise, use 8.8.8.8 for one, 8.8.4.4 for another.

Once you have made and saved those entries, TrueNAS should be able to get to the outside world. The other requirement to send the test email successfully is that you have entered a valid email address for the root user in Accounts/Users.

For more help, please post your system information as requested in the Forum Rules.

 

[neofusion]

OK - You need to fill in your IPv4Default Gateway and DNS servers on the screen above.

Your default gateway is most likely the IP address of your router - maybe 192.168.50.1?

For DNS Nameservers - unless you know otherwise, use 8.8.8.8 for one, 8.8.4.4 for another.

Once you have made and saved those entries, TrueNAS should be able to get to the outside world. The other requirement to send the test email successfully is that you have entered a valid email address for the root user in Accounts/Users.

For more help, please post your system information as requested in the Forum Rules.

If you want to use a public DNS service you can typically do that from a central place in your router instead.

So a divergent opinion would be to use the IP address of your router as Nameserver 1 and let the router control DNS lookup instead of hardcoding 8.8.8.8 or something similar.

 

[Redcoat]

I've followed the documentation on how to set it up

I forgot to ask earlier - what documentation did you follow that did not identify the need to set up your default gateway and nameservers? The TrueNAS docs from the link on the masthead have this page https://www.truenas.com/docs/core/gettingstarted/consolesetupmenu/ which definitely covers them as items 4 and 6.

 

[Redcoat]

So a divergent opinion would be to use the IP address of your router as Nameserver 1 and let the router control DNS lookup instead of hardcoding 8.8.8.8 or something similar

Yes, I have mine set up that way, but I’m uncertain if that always works…

 

[neofusion]

Yes, I have mine set up that way, but I’m uncertain if that always works…

It doesn't always work, but then again what always works?
If the router breaks you're not going to reach 8.8.8.8 anyway, even if hardcoded on the appliance.