When you've got a web hosting plan and you create an e-mail address, you might consider the option to send out and receive emails for granted, however, this isn't always true. Sending emails is not always included in the website hosting packages that providers will offer you and an SMTP service is necessary to be able to do that. The acronym means Simple Mail Transfer Protocol and that is the software application that permits you to send emails. If you are using an email application, it creates a connection to the SMTP server. The latter then looks up the DNS records of the domain, that is a part of the receiving address to find out which email server manages its email messages. After some system data is exchanged, your SMTP server delivers the email to the remote IMAP or POP server and then the e-mail is finally delivered in the matching mailbox. An SMTP server is required if you are using some kind of contact page as well, so if you use a no charge hosting package, for example, it's probable that you won't have the ability to use such a form as most free of charge hosting companies do not allow outgoing e-mail messages.