Changes

Mail protocols; servers; services; mail clients; mail add-ons; security and anti-virus; encryption technology for privacy; etiquette; storage, retention; backup; attachments; email marketing; mailing lists; groupware; collaboration; email as a messaging sub-system. If you want to add email to your PHP application or website, then try https://github.com/PHPMailer/PHPMailer If your application already has email capability, but it won't send, then turn on the mail_log feature in php.ini and check that sendmail/postfix is installed on your system. You might start with <code>sudo apt-get install mailutils</code>. If on AWS or datacenter, you can set up as an internet site and be done. If you are behind a consumer broadband IP, you will probably need to setup a 'smarthosted' site and use (your own) IMAP credentials to send email through another provider.