Access the source for an email message in

  1. View the source of an email message in
  2. Access the source of an email message in
  3. How to interpret message headers

View the source of an email message in

With, you can access the source of any email message and see, for example, what path it took to log in to your account (using headers) or making the left column look a little odd (using HTML code).

The instructions in this article apply to and Outlook Online.

Access the source of an email message in

To view the full email source in

  1. Select or open an email.

  2. Select Additional promotions (3 horizontal dots).

  3. Select View the message source

  4. View and browse the content.

  5. When you’re ready, choose close to

How to interpret message headers

Checking the headers can provide valuable information about the message:

  • Have received † Shows the mail servers that processed the message from source to destination on its way.
  • way back † Displays a reply to an address that may be different from the sender’s address.
  • Verification Results † Indicates whether (and to what extent) the sender’s mail server has verified the sender’s credentials.
  • date † Displays the date the message was sent by the sender.
  • By † Shows the email address and frequently displayed name of the person who sent the message.
  • Answer † Displays the address used to reply to the message. May not match the sender’s address.
  • Message ID † Specifies an email tracking number.
  • Priority : is used differently by different servers and some don’t use it at all.
  • List-Unsubscribe † Specifies the email address used to unsubscribe from the mailing list from which the message was received.
  • X Spam Score † Determines, in the opinion of the server, the probability that the message is spam. If the score exceeds a certain number, the message may be automatically moved to the spam folder.

There are many approved email header types, and many are used inconsistently or inconsistently by Internet standards administrators. Despite the variety of information, these headings provide useful information about the message, sender, and path to your inbox.

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