Where is the SMTP settings specified at installation Networks-ce, which mailer is used by default?

I noticed that after setapa networks-ce сentos7 out of the box does not work email. In the same networks-ee сentos7 no such problems. Where to dig me is completely unclear. Do you have the same Networks in clear dock installed components:
(Architecture clear)
1) Where they cataplasia? (maybe there is a Doc separately installable components, or better auto-setup script to orientirovat)
2) Can they choose?
3) Where they store the config?
4) Why in the file /etc/networks networks.rb zakomentiroval all the configs and where can I see the configs by default?
5) That is used by default as the mail server? Outbound Email(easyDNS)?

Maybe I'm asking a lot of questions, but let's not sending to Google and off the docks, it's too obvious a case to which I have already tried to do and not do. Please answer briefly(if you want I'll be grateful for a response) and posuti (without posting anywhere).
With respect.
April 3rd 20 at 18:35
2 answers
April 3rd 20 at 18:37
/etc/networks networks.rb EVERYTHING. Mail is normally configured from there. After that works fine. At least I have.
After changes it is necessary to make networks-ctl reconfigure and networks-ctl restart
Configuret to manually config of opt, etc. is not worth it - networks.all rb will overwrite the first call.
On the official website of the documentation most things are very well described.
Unlike ee and ce versions of the traditional of any of this software.
/etc/networks networks.rb EVERYTHING. Mail is normally configured from there. After that works fine. At least I have.

I understand, I also configured as a mailer gmail account as shown in the example and it worked.
The question is:
In networks-ee send mail according to the logs postfix is running on, what the postfix config (/etc/postfix/main.cf ) is identical for networks-ee networks-ce. - Chelsea.Altenwer commented on April 3rd 20 at 18:40
@Chelsea.Altenwer, I networks-ce, as in networks-ee does not know. All settings in /etc/postfix/main.cf I have a default. - Anne_Kerlu commented on April 3rd 20 at 18:43
April 3rd 20 at 18:39
Can only answer point 5:
The default for the whole OS using a local postfix mail service, which is out of the box is likely to be trying to send emails from username@localhost and its unlikely someone will. To check this out, just see if there is any error in /var/log/maillog

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