My understanding is that a clean installation has email messaging built-in. Am I correct ?
Not really. Emails depend on your server configuration. Check your log files. Check your php email configurations. Check your sendmail/postfix/Microsoft Exchange Server/long list of possibilities configurations.
If it’s not working out of the box then there’s no simple solution here.
I am having a similar issue. My interpretation of this thread is that if emails are not being received by prospective users, then it is a server-side issue, but it can also be solved by installing an SMTP plugin? What plugin do people recommend? There are a few.
Not actually. Emails depend upon your server configuration. Check your log files. Check your Hypertext Preprocessor email configurations. Check your sendmail/postfix/Microsoft Exchange Server/lengthy or temp maillike OwlyMail listing of opportunities configurations.