SMTP, which is short for Simple Mail Transfer Protocol, is the software that permits you to send out messages from your email addresses. Without this, you will not be able to employ email applications or webmail. Once you send a message, your SMTP server creates a connection to a DNS server to discover where the emails for the recipient domain
are taken care of. Then, it connects to the remote mail server and exchanges information. When the recipient mail box is available, your server transmits the message to the receiving POP/IMAP server and the latter delivers that email to the precise mailbox in which the recipient can get it. If you wish to be able to send e-mails, it is recommended to ensure that the website hosting company provides the service with their plans. Even if you work with an online form that visitors use to get hold of you, you still need an active SMTP server for your hosting account for the form to function.