When you have a shared website hosting plan and you set up an email address, you might take the option to send out and receive messages for granted, however, that isn't always true. Sending emails isn't always part of the hosting plans that companies have and an SMTP service is required to be capable to do that. The abbreviation stands for Simple Mail Transfer Protocol and that is the set of scripts that enables you to send out emails. If you work with an email program, it creates a connection to the SMTP server. The latter then queries the DNS records of the domain name, that is a part of the receiving address to find out which mail server manages its emails. After some system data is interchanged, your SMTP server provides the e-mail to the remote IMAP or POP server and the e-mail is finally delivered in the corresponding mailbox. An SMTP server is needed if you work with some sort of contact page form too, so in case you have a no charge hosting plan, for example, it's probable that you won't have the ability to make use of such a form as many cost-free web hosting service providers do not allow outgoing e-mails.