How SMTP Server works

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SMTP Server is nothing but a combination of hardware and software. It is programmed in such a way that it can send email messages to the right destination. In order to send emails one has to connect to the internet through an emailing solution or application. There are many email applications out there such as Microsoft Outlook. This application helps you to access your email server. The email sending protocol used on the internet is known as SMTP; it stands of Simple Mail Transfer Protocol.

SMTP usually works in coordination with POP3 server. POP3 stands for Post Office Protocol. Sometimes, SMTP is also connected with IMAP, which is the abbreviated form of Internet Mail Access Protocol. These two servers are used to receive email messages. All SMTP set up works with either or both POP3 or IMAP.

When you send an email, your computer or the emailing application sends the message to the SMTP server. The SMTP server then reads the message in terms of its destination and all. Once the destination is finalized, SMTP forwards the mail to the recipient's mail server. All the SMTP servers are programmed in such a way that you do not need to send them any additional instructions at all. As soon as you send email, they start working and act accordingly. All the processes take place in the back end.

In case, the recipient's address is not available, or not verified, SMTP keeps sending mails repeatedly for few days, as it is programmed. If all the attempt fails, it generates a delivery fail report and sends it to the sender.

Your own SMTP or Free emails?

You can use free emails to send receive email messages. There are many free email service providers such as Yahoo! mail, Gmail, Hotmail etc. If you use any such service you do not require SMTP server download. Your mail service provider takes care of everything.

However, if you want your own SMTP set up in order to control the email messaging process the way you want, you need to have SMTP server in place. You need SMTP server download; once the server is downloaded and installed you have to configure it according to your requirements.

In case you have to send bulk emails frequently, you may need to configure your SMTP server in such a way that bulk emails do not get blocked anywhere.

When you use the email system of a free email service provider, you may not need to use any emailing application. You can simply access your inbox or send mails through a browser.

However, free emails have some limitations. You cannot modify the email templates as you want. If you run a business and you need to send marketing emails frequently, you may want to use HTML email templates. A free email service will not allow you.

Though the security systems of modern free email services are pretty good, you may always want to have a stronger security. With your own SMTP set up, you can have a good antivirus installed so that no virus breaks through the system.
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