If you have a cloud web hosting account and you set up an e-mail address, you might consider the option to send and receive messages for granted, however, this is not always true. Sending e-mail messages is not always part of the hosting plans that providers have and an SMTP service is required to be capable to do that. The acronym represents Simple Mail Transfer Protocol and that is the set of scripts that permits you to send out e-mail messages. If you use an email application, it creates a connection to the SMTP server. The latter then looks up the DNS records of the domain, which is a part of the receiving address to find out what mail server manages its emails. After system data is exchanged, your SMTP server delivers the email to the remote IMAP or POP server and the e-mail is finally delivered in the related mailbox. An SMTP server is required if you use some sort of contact form also, so if you have a free hosting plan, for example, it's probable that you won't have the ability to use this type of form as most no charge website hosting service providers do not allow outgoing e-mail messages.