Can't send an email to the outside world

[alefattorini (Alessio Fattorini)]

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Howto solve sending emails problems (for Dummy)

Premise: I would like to create a not too technical howto to address the most common issues that prevent the sending from our mail server. Before talking about the problem, I thought it appropriate to define (simplifying) some necessary concepts Semplify theory DNS Server: DNS Server manages the host name (www.mydomain.com) <-> IP (X.X.X.X) resolution for one or more domains (mydomain.com). If the DNS server is not Nethserver, changes must be made by a web configuration panel or by asking …