In case you have a web hosting package and you create an e-mail address, you might take the option to send out and receive emails for granted, however, this is not always true. Sending email messages is not necessarily a part of the web hosting plans that service providers offer and an SMTP service is required to be capable to do that. The abbreviation signifies Simple Mail Transfer Protocol and that is the software application that enables you to send out emails. If you are using an email application, it creates a connection to the SMTP server. The latter then requests the DNS data of the domain name, that is a part of the receiving address to find out which mail server deals with its emails. After some system data is swapped, your SMTP server provides the message to the remote IMAP or POP server and the email is finally delivered in the related mailbox. An SMTP server is required if you are using some sort of contact page also, so if you use a cost-free hosting plan, for example, it is likely that you won't have the ability to make use of this type of form since many no charge hosting service providers do not allow outgoing emails.