What does SMTP mean when sending an email?

SMTP is a protocol that emails senders can use to communicate with servers that handle incoming emails, like Mail.

Ru servers. When sending an email, your email program will use SMTP to send the email and deliver it to the recipient.

You can use the mail command to see what protocols your email program is using to send email, or you can use the help command to see which commands are available for use by the command you're trying to use. You may want to check your email program's manual, too, to see what it has to say about the specific command you want to use.

How do I get rid of the "SMTP: invalid response" error message? You have an email program that's trying to send a message but it keeps getting an error message that says something like "SMTP: invalid response". This error is usually caused by a temporary error in your email program or network connection. This problem will go away as soon as your program gets over its current glitch.

You can tell if your email program is having a problem because you'll see that message in your mail window. If the message isn't there, that means your program is working fine and the error message is being caused by another problem.

How do I set up my computer so it can send email? If you're new to email, you may have never thought about setting up your computer to send email. But the truth is, your computer is already set up to send email. Your email program is just one of many programs that are waiting for you to tell them how to send email to other computers.

One way to send email is to use a web browser to go to a website, such as mail. In this case, your email program will connect to the web server, ask it how to send email, and then deliver the message. You may also use other websites or programs to send email. If you use a website or program to send email, your email program will connect to that server.

Another way to send email is to use the mail command. With the mail command, you'll use a set of commands to tell your email program how to send email to other computers.

What is SMTP and why is it used?

SMTP is a protocol used for sending e-mail from one host to another.

It is the foundation for the e-mail system we use today. SMTP is what is behind the "send" button in your e-mail client. SMTP is not used for actual delivery of the mail (that's done by the local MTA), but for the initial message transfer. You can also use SMTP for delivery notifications, because they are always sent to the recipient's SMTP server.

The e-mail system we use today is much more than just SMTP. It's much more complex. But SMTP is the building block that makes it work.