how to generate barcode in c# net with example Sending and Receiving Mail in Font

Encode QR Code 2d barcode in Font Sending and Receiving Mail

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Sending and Receiving Mail
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t s a rare web application that doesn t need to send mail from time to time. For example, you may want to send messages to welcome users who sign up to your site, relay passwords, or confirm orders placed with an online store. Rails ships with a library called Action Mailer, which provides developers with an easy-to-use yet powerful tool to handle email. In this chapter, we ll explain how Action Mailer works and how to use it in your applications. We ll start by describing how to configure it, and then we ll show you a few examples of how to send email in various formats. In addition to sending mail, Action Mailer is also capable of receiving mail, an advanced topic that we ll touch on briefly.
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Setting Up Action Mailer
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Like Active Record and Action Pack, Action Mailer is another one of the components that make up the Rails framework. It works much like the other components of Rails: mailers are implemented as models, and mailer templates are implemented as views. Because it s integrated into the framework, it s easy to set up and use, and requires very little configuration to get going. When you send email using an email client such as Outlook or a web-based email application like Gmail or Yahoo Mail, your messages are sent via a mail server. Unlike a web server, Rails doesn t provide a built-in mail server. You ll need to tell Action Mailer where your email server is located and how to connect to it. This sounds a bit complicated, but it s really quite easy. Depending on what kind of computer you re using, you might have a mail server built in (this is true of most UNIX systems). If not, you can use the same server that you use to process your regular email. If this is the case, you can find your server information in your email client settings, as provided by your Internet service provider (ISP), or in the settings section of your web-based email application, like Gmail.
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CHAPTER 8 SENDING AND RECEIVING MAIL
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Before you can send email from your Rails application, you need to tell Action Mailer how to communicate with your mail server. Action Mailer can be configured to send mail using either sendmail or an SMTP server. SMTP stands for Simple Mail Transfer Protocol and is the core Internet protocol for relaying mail messages between servers. If you re on Linux, OS X, or any other UNIX-based system, you re in luck. You can use sendmail, and as long as it s in the standard location (/usr/bin/sendmail), you don t need to configure anything. If you re on Windows, or if you want to use SMTP, you have some work to do. Action Mailer options are set at the class level on ActionMailer::Base. The best place to set these options is in your environment.rb file, located in the config directory of your application. Doing your configuration in config/environment.rb will ensure that your settings apply for all environments. Remember, though, that settings in any of the environment-specific configuration files, (config/environments/*.rb) take precedence over the global environment.rb, so it s easy to configure Action Mailer to use different settings depending on the environment. We re going to describe how to set up Action Mailer to use SMTP, since it will work on all systems. To do this, we set the delivery_method option to :smtp and supply the SMTP settings via the smtp_settings option. The smtp_settings method expects a hash of options, all of which are shown in Table 8-1.
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Table 8-1. Server Connection Settings Setting
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address port domain authentication user_name password
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Description
The address of your mail server. The default is localhost. The port number of your mail server. The default is port 25. If your email server responds to different domain names, you might need to specify your domain name here. If your mail server requires authentication, you need to specify the authentication type here. This can be one of :plain, :login, :cram_md5. The username you ll use to authenticate when you connect to the mail server, if your server requires authentication. The password you ll use to authenticate when you connect to the mail server, if your server requires authentication.
Listing 8-1 shows a typical configuration for a server that requires authentication. You can use this sample configuration as a starting point to configure your connection. You ll need to change each of the settings (authentication, username, password, and address) to connect to your own SMTP server. Again, if you re using sendmail as the delivery method, you don t need to set this up at all; everything should just work out of the box.
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