What Does SMTP mean?

Do I need SMTP server to send email?

I have to send email to a mobile user from my application.

Is it possible to do that without using SMTP server? Is it necessary to have a SMTP server to send email? You don't need to use a SMTP server to send email. You just need a working SMTP server. What you probably want is a SMTP server, which is capable of receiving mail and sending it on your behalf. You can find a list of good ones here:
If you're not worried about your users' ISPs blocking port 25, then you can use Sendmail or Postfix as your SMTP server. If your users are behind NAT routers, you will probably need to use an external SMTP server like GMail, Outlook.com, etc.

What is SMTP and why is it used?

A typical SMTP (Simple Mail Transfer Protocol) email server will have an interface with a web browser (say, Chrome or Firefox) which the user can enter a (valid) email address and receive an email that is delivered (usually just sent) to that address. If you try to use an address that the server doesn't have stored as an email address, the server will tell you the address is invalid. There are more sophisticated ways of creating mail addresses on a web server, but these are beyond the scope of this page. For now, it will suffice to say that an email address should be of the form: user@domain.com If the server has an entry for user@domain.com, then the mail server will deliver messages that are addressed to that address to user@domain.com (the domain being optional). It won't send emails addressed to another domain (eg foo@bar.org) to user@foo.org)

It may sound as if an SMTP server is just a fancy way of saying an email server. That's not quite accurate, because SMTP is actually a protocol for exchanging emails between computers.

In practice, the email address in an email client such as Gmail is created by sending a message to the SMTP server (using an email address such as user@domain.com, with the name user and a default domain of domain.com). The SMTP server replies with a message (such as user@domain.com: Hello!) that contains the email address of the person at the other end of the Internet.

This works surprisingly well, but it means that email is usually delivered over SMTP because the address book is based on a centralised database where all messages are sent and all recipients look up and fetch their own messages. Email in a web browser makes a lot of requests to web servers over HTTPS (HTTPS is the same encryption-free internet encryption as used by banking sites and payment card sites), which is much less efficient and results in a lot of traffic.

What is an SMTP server?

What is the difference between an SMTP server and a Mail transfer agent?

What are Email servers?

SMTP & MTAs. SMTP - The Simple Mail Transfer Protocol refers to a networking standard for exchanging electronic mail messages. As a protocol, it is independent of the particular type of message delivery device used by each party. For example, messages can be delivered as Internet email, Post Office mail to a postal mailbox, phone mail or fax or, in the case of a private user on a private network, can be communicated as voice telephone mail, facsimile or electronic message. Messages that are transmitted according to SMTP may be referred to as electronic mail messages.

An SMTP hostname or IP address is defined in RFC-791 (rfc793 .txt) as an Internet Service Provider (ISP) or Post Office Mail-Accepting Network (PON). In this way, any mail client will connect to a SMTP server if one is available.

One of the main features of the SMTP protocol is the ability to connect a sender's mail message to multiple receivers. Many mail servers are capable of delivering many mail messages as well as accepting mail on behalf of many clients (eg, mail acceptors or MTAs.)

SMTP servers can relay messages from one mailbox to another using an "sender based routing mechanism" which allows messages to be addressed in bulk to any group of receivers. A typical use of this facility is bulk mail delivery for a commercial printer: Recipient list: "To:" the printer. Address of each receiver: "Cc:" the printers owner. The use of the SMTP protocol is described in RFC -822 . This document covers several variations of electronic mail messages including Multipurpose Internet Mail Extensions (MIME) content types and the Simple Mail Transfer Protocol (SMTP). This text was first published by the IETF, the standards body responsible for internet related standards. The entire collection of internet standards can be found online through the standards website.

Mail Transfer Agents (MTAs). A mailbox may have different means of reception and storage depending on the configuration of its mail server. There are many configurations; each requiring a specific protocol to be set up. In most cases, mail will reach the mailbox by a network gateway which has been programmed to retrieve mail from the internet and deliver it to its local users.

How Does SMTP Work?

At first glance, SMTP seems to work perfectly.

You send an email with an attached image, and Bob at some other mail server can receive it.

But there are a few ways you can mess this up. A simple way to mess it up is to attach the image as a text file instead of a file-attachment. You should also specify your full email address when you're sending, not just your username, for example: To: email@domain.com (bob@mail.net)

You can also add multiple recipients, all separated by commas. The recipient will get email notification if you send mail to any of these people, but they will not be automatically subscribed to the mailing list.

Another trick to mess this up is to include HTML. You can use this to change the subject line and/or message body, however, some mail servers don't like this. Here's an example. Notice how the email has the recipient's name in bold and the subject line is a link.

Subject: The Python website. The recipient only gets the email notification if the sender sends mail to an IP that corresponds to mail.python.org. You can see which IPs it was sent to here:

When you send email through SMTP, most servers will treat it as a trusted connection from one of their own machines. This makes it a perfect place for spamming your friends and coworkers.

The next time you send email to the same mail server you'll get a bounce back notification.

What Does SMTP mean?

What is the concept of mail server?

How it works and where does the mail goes to after receiving? We will know how to configure the Server or send an email in local host and how to configure mail server? What You Will Get After Downloading? For the beginner this is pretty much all what you'll need to know. This guide will give you a good starting point on your journey into learning postfix (the mail server software that we'll be using).

What We'll Be Using. A very basic understanding of command line and Linux is essential as you won't have enough time to learn more specific topics as well as use multiple methods to accomplish things. Here is a brief list of things we'll be doing with this guide: Install the basic requirements of the software - A mail server software called postfix and a tool called mailx. Read more for mailx installation here.

Verify mail flow. You don't need to have your mail go to a mail server, so make sure that you forward your mail to your own IP (localhost) via a different port like 25, and make sure you can actually see it in your web browser. We're going to test by sending and receiving an email from command line

Test a local postfix. How It Works. The basic process of a mail server goes something like this: There are some important steps involved in this process - the three being authentication, delivery, and queuing. We'll go over these later.

Authentication: Once the message goes in, the next step would be to know if this email has come from a valid address. If so, do we allow the sender to send messages? That's authentication. We have to know who is actually sending the email so that we can tell them to shut up and send us email. Delivery: We know that the email went to the proper place, so we verify that, and then we move it to the inbox. Queuing: We've made a reservation for the email to arrive once we are done reading it, so that all subsequent emails do not overwrite it.

Installation & Setup. Installing software on a Linux machine means installing software that needs to be there, and that means compiling a library.

What is my SMTP for my email?

If you have a domain name, you can use that email address for your own personal email.

What if I want to use my own email address? If you don't have a domain name, you can use your own email address for your own personal email. Can I use my own email address? You can use your own email address for your own personal email. How do I connect to the internet? You connect to the internet using an Ethernet cable from your modem to your router. You plug the Ethernet cable into your router. Then you log in to the web site of your ISP. They tell you where to plug your computer in to your modem.

What is the SMTP (email) protocol? SMTP is the protocol used for sending email. How do I use my email account? Email is easy. In your email program, click on the message and it will open. You can reply to the sender, edit the message, or just delete it. If you send a message and don't receive answer, check your email program.

Where are my email messages stored? Your email messages are stored in your email program. You can access them whenever you want.

How do I send and receive attachments? Attachments are called files. Click on the attachment to open the file. If you want to send an attachment, click on the email you want to send it to. Then click on the attachment. Then click on the Send button.

How do I attach files to my email? Click on the attachment. Click on the Send button.

How do I delete my email messages? You can delete all your email messages or just one message. Can I change my email address? Yes. If you use your own email address, you can change it at any time.

What is my SMTP (email) port?

How does SMTP work?

At first glance, SMTP seems to work perfectly.

You send an email with an attached image, and Bob at some other mail server can receive it.

But there are a few ways you can mess this up. A simple way to mess it up is to attach the image as a text file instead of a file-attachment. You should also specify your full email address when you're sending, not just your username, for example: To: email@domain.com (bob@mail.net)

You can also add multiple recipients, all separated by commas. The recipient will get email notification if you send mail to any of these people, but they will not be automatically subscribed to the mailing list.

Another trick to mess this up is to include HTML. You can use this to change the subject line and/or message body, however, some mail servers don't like this. Here's an example. Notice how the email has the recipient's name in bold and the subject line is a link.

Subject: The Python website. The recipient only gets the email notification if the sender sends mail to an IP that corresponds to mail.python.org. You can see which IPs it was sent to here:

When you send email through SMTP, most servers will treat it as a trusted connection from one of their own machines. This makes it a perfect place for spamming your friends and coworkers.

The next time you send email to the same mail server you'll get a bounce back notification.

Is SMTP address same as email address?

I have a simple email address such as abc@gmail.

Com. I am sending an email to that address from another account, but the recipient is not getting the email. What am I missing?

Well if you are sending emails from a different host and your gmail account is hosted by Google it is possible that you need to add the "sender" email address of the other host as an alias to your gmail account. If you don't have to access the "sender" email address directly or only have the "from" email address (ie you can't retrieve the "sender" email address from your gmail account) there should be a way to contact someone at Google about this issue.