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<seo title="What is mail header" metakeywords="what is mail header,email header,read header,e-mail header,send mail" metadescription="What is mail header" /> | <seo title="What is mail header" metakeywords="what is mail header,email header,read header,e-mail header,send mail" metadescription="What is mail header" /> | ||
| + | <br> | ||
<div align=justify>All of us regularly send mails. We just enter the text and click 'Send'. But do you know that emails consist not only of the text? Each email consists of 2 parts: | <div align=justify>All of us regularly send mails. We just enter the text and click 'Send'. But do you know that emails consist not only of the text? Each email consists of 2 parts: | ||
| − | * | + | * ''email body;'' |
| − | * | + | * ''email header'' |
Email body is the message itself, i.e. the text you enter into the body field. | Email body is the message itself, i.e. the text you enter into the body field. | ||
| − | Email | + | Email header contains fields that identify particular routing information of the message, including the sender, recipient, date and subject. |
'''Note:''' many email clients don't display the header information by default. | '''Note:''' many email clients don't display the header information by default. | ||
| Line 19: | Line 20: | ||
You may ask: when I send mails I do not add any header. What is mail header? Where do they come from? How can I read headers to understand what is written there? | You may ask: when I send mails I do not add any header. What is mail header? Where do they come from? How can I read headers to understand what is written there? | ||
| − | Here's an example of a message header for an email sent from ''MrBrown@ | + | Here's an example of a message header for an email sent from ''MrBrown@myidealhost.com'' to ''MrBlack@myidealhost.com''. We'll let you know how to read headers: |
| − | + | Delivered-To: MrBlack@myidealhost.com | |
| − | + | Received: by 10.36.81.3 with SMTP1 id e3cs239nzb; | |
| − | Tue, 29 Mar 2005 15:11:47 -0800 (PST) | + | Tue, 29 Mar 2005 15:11:47 -0800 (PST) |
| − | + | Return-Path: | |
| − | + | Received: from mail.myidealhost.com | |
| + | (mail.myidealhost.com [111.111.11.111]) | ||
| + | by mx.myidealhost.com with SMTP | ||
| + | id h19si826631rnb.2005.03.29.15.11.46; | ||
| + | Tue, 29 Mar 2005 15:11:47 -0800 (PST) | ||
| + | Message-ID: <20050329231145.62086.mail@mail.myidealhost.com> | ||
| + | Received: from [11.11.111.111] by mail.myidealhost.com via HTTP; | ||
| − | + | Tue, 29 Mar 2005 15:11:45 PST | |
| − | + | Date: Tue, 29 Mar 2005 15:11:45 -0800 (PST) | |
| − | + | From: Mr Jones | |
| − | + | Subject: Hello | |
| − | + | To: Mr Smith | |
| − | + | ||
| − | + | ||
In the example, headers are added to the message three times: | In the example, headers are added to the message three times: | ||
| Line 39: | Line 44: | ||
''When Mr. Brown composes the email'' | ''When Mr. Brown composes the email'' | ||
| − | + | Date: Tue, 29 Mar 2005 15:11:45 -0800 (PST) | |
| − | + | From: Mr Brown | |
| − | + | Subject: Hello | |
| − | + | To: Mr Black | |
| − | ''Mr. Brown sends email through his email provider, mail. | + | ''Mr. Brown sends email through his email provider, mail.myidealhost.com'' |
| − | + | Message-ID: <20050329231145.62086.mail@mail.myidealhost.com> | |
| − | + | Received: from [11.11.111.111] by mail.myidealhost.com via HTTP; | |
| − | + | Tue, 29 Mar 2005 15:11:45 PST | |
| − | Tue, 29 Mar 2005 15:11:45 PST | + | |
''When the message transfers from Mr. Brown's email provider to Mr. Black's example address'' | ''When the message transfers from Mr. Brown's email provider to Mr. Black's example address'' | ||
| − | + | Delivered-To: MrBlack@myidealhost.com | |
| − | + | Received: by 10.36.81.3 with SMTP id e3cs239nzb; | |
| − | + | Tue, 29 Mar 2005 15:11:47 -0800 (PST) | |
| − | + | Return-Path: MrBrown@myidealhost.com | |
| + | Received: from mail.myidealhost.com (mail.myidealhost.com | ||
| + | ([111.111.11.111]) | ||
| + | by mx.myidealhost.com with SMTP id h19si826631rnb; | ||
| + | Tue, 29 Mar 2005 15:11:47 -0800 (PST) | ||
Below is a description of each section of the email header: | Below is a description of each section of the email header: | ||
| − | Delivered-To: MrBlack@ | + | Delivered-To: MrBlack@myidealhost.com |
''The email address the message will be delivered to.'' | ''The email address the message will be delivered to.'' | ||
| − | Received: by 10.36.81.3 with SMTP id e3cs239nzb; | + | Received: by 10.36.81.3 with SMTP id e3cs239nzb; |
| − | Tue, 29 Mar 2005 15:11:47 -0800 (PST) | + | Tue, 29 Mar 2005 15:11:47 -0800 (PST) |
''The time the message reached example's servers.'' | ''The time the message reached example's servers.'' | ||
| − | Return-Path: | + | Return-Path: |
''The address from which the message was sent.'' | ''The address from which the message was sent.'' | ||
| − | Received: from mail. | + | Received: from mail.myidealhost.com |
| − | (mail. | + | (mail.myidealhost.com [111.111.11.111]) |
| − | by mx. | + | by mx.myidealhost.com with SMTP |
| − | Tue, 29 Mar 2005 15:11:47 -0800 (PST) | + | id h19si826631rnb.2005.03.29.15.11.46; |
| + | Tue, 29 Mar 2005 15:11:47 -0800 (PST) | ||
| − | ''The message was received from mail. | + | ''The message was received from mail.myidealhost.com, by a example server on March 29, 2005 at approximately 3 pm.'' |
| − | Message-ID: 20050329231145.62086.mail@mail. | + | Message-ID: 20050329231145.62086.mail@mail.myidealhost.com |
| − | ''A unique number assigned by mail. | + | ''A unique number assigned by mail.myidealhost.com to identify the message.'' |
| − | Received: from [11.11.111.111] by mail. | + | Received: from [11.11.111.111] by mail.myidealhost.com via HTTP; |
| − | Tue, 29 Mar 2005 15:11:45 PST | + | Tue, 29 Mar 2005 15:11:45 PST |
| − | ''Mr. Brown used an email composition program to write and send the mail message, and it was then received by the email servers of mail. | + | ''Mr. Brown used an email composition program to write and send the mail message, and it was then received by the email servers of mail.myidealhost.com.'' |
| − | Date: Tue, 29 Mar 2005 15:11:45 -0800 (PST) | + | Date: Tue, 29 Mar 2005 15:11:45 -0800 (PST) |
| − | From: Mr Brown | + | From: Mr Brown |
| − | Subject: Hello | + | Subject: Hello |
| − | To: Mr Black | + | To: Mr Black |
''The date, sender, subject, and destination -- Mr. Brown entered this information (except for the date) when he composed the email.''</div> | ''The date, sender, subject, and destination -- Mr. Brown entered this information (except for the date) when he composed the email.''</div> | ||
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