By default, WordPress uses the PHP Mail function to send emails. However, it is not the best method and may decrease email deliverability. Emails may often arrive in the spam/junk folder. As an alternative, you can use SMTP to send emails.
In order to send emails via SMTP follow the steps below:
Choose an SMTP server
There is a wide range of free SMTP servers that can be set up on a mail client to deliver your emails. For further information about SMTP servers please refer to this article.
Register for the SMTP server
After choosing an SMTP service, you need to register for it. To learn more about registering for an SMTP service please refer to this article.
Integrate the SMTP service with your WordPress website
There are many WordPress plugins that help you to integrate an SMTP service into your WordPress website. We suggest you to read this article to learn more about configuring an SMTP plugin.