How bluehost sends mail wordpress

Bluehost, a popular web hosting company, uses a combination of technologies to send emails from WordPress websites hosted on their servers. Here's a high-level overview of the process:

1. Mail Server: Bluehost uses a mail server, which is a software application that handles email messages. The mail server is responsible for receiving, storing, and sending emails.
2. Postfix: Bluehost uses Postfix, an open-source mail transfer agent (MTA), as their mail server. Postfix is responsible for routing emails to their destination.
3. Sendmail: Bluehost also uses Sendmail, another open-source MTA, to send emails. Sendmail is used to send emails from WordPress websites to external recipients.
4. PHPMailer: Bluehost uses PHPMailer, a popular PHP library, to send emails from WordPress websites. PHPMailer is used to create and send emails using the PHP programming language.
5. WordPress: WordPress, the popular content management system, uses PHPMailer to send emails. When a user submits a form or triggers an email notification, WordPress uses PHPMailer to create and send the email.
6. Bluehost's Email Configuration: Bluehost configures their mail server to use a specific email address as the "From" address for outgoing emails. This email address is usually in the format of [email protected].
7. SPF and DKIM: Bluehost also sets up Sender Policy Framework (SPF) and DomainKeys Identified Mail (DKIM) to help prevent spam and ensure email deliverability. SPF helps prevent spammers from sending emails that appear to come from your domain, while DKIM adds a digital signature to emails to verify their authenticity.
8. Email Relay: When a WordPress website sends an email, the email is relayed through Bluehost's mail server. The mail server checks the email's authenticity and then forwards it to its destination.

Here's a simplified diagram of the process:

          +---------------+
          |  WordPress  |
          +---------------+
                  |
                  |  PHPMailer
                  v
          +---------------+
          |  Bluehost's  |
          |  Mail Server  |
          +---------------+
                  |
                  |  Postfix
                  v
          +---------------+
          |  Sendmail    |
          +---------------+
                  |
                  |  External  |
                  |  Recipient  |
                  v
          +---------------+
          |  Email Inbox  |
          +---------------+

Keep in mind that this is a simplified diagram, and the actual process may involve additional steps and technologies.