When you've got a shared web hosting account and you create an email address, you may consider the option to send and receive messages for granted, however, this isn't always the case. Sending e-mail messages isn't always a part of the website hosting plans that service providers have and an SMTP service is required to be able to do that. The acronym stands for Simple Mail Transfer Protocol and this is the set of scripts that allows you to send out email messages. If you work with an email app, it creates a connection to the SMTP server. The latter then searches the DNS records of the domain, which is a part of the receiving address to find out what mail server deals with its e-mails. After system data is exchanged, your SMTP server provides the message 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 use some sort of contact form also, so in case you work with a free of charge hosting package, for example, it's probable that you will not be able to make use of such a form as most free of charge web hosting service providers do not allow outgoing emails.