How to get mail header

There are several ways to get the mail header of an email message, depending on the email client or server you are using. Here are a few common methods:

Using an email client:

  1. Outlook: In Outlook, you can view the mail header by clicking on the "View" menu, then selecting "Message Header" or pressing Ctrl+Shift+H.
  2. Gmail: In Gmail, you can view the mail header by clicking on the three vertical dots next to the sender's name, then selecting "Show original".
  3. Thunderbird: In Thunderbird, you can view the mail header by clicking on the "View" menu, then selecting "Message Source" or pressing Ctrl+U.

Using a command-line email client:

  1. Telnet: You can use Telnet to connect to an email server and retrieve the mail header using the following command:

    telnet <server> <port>

    Replace <server> with the name of the email server and <port> with the port number (usually 25 for SMTP).

  2. Fetchmail: You can use Fetchmail to retrieve the mail header using the following command:

    fetchmail -v -c <account> -f <message_id>

    Replace <account> with the name of your email account and <message_id> with the ID of the message you want to retrieve.

Using a programming language:

  1. Python: You can use the imaplib and email libraries in Python to retrieve the mail header. Here is an example:
    
import imaplib
import email

Connect to the email server

mail = imaplib.IMAP4_SSL('imap.gmail.com') mail.login('[email protected]', 'your_password') mail.select('inbox')

Search for the message

status, messages = mail.search(None, 'ALL')

Retrieve the message

for num in messages[0].split(): status, msg = mail.fetch(num, '(RFC822)') raw_message = msg[0][1]

Parse the message

message = email.message_from_bytes(raw_message)

Print the mail header

print(message['From']) print(message['To']) print(message['Subject']) print(message['Date'])


Replace `'[email protected]'` and `'your_password'` with your actual email address and password.

**Using a web-based email client:**

1. **Webmail**: Most web-based email clients, such as Yahoo Mail or AOL Mail, allow you to view the mail header by clicking on the "View" or "Details" button next to the message.

Note that some email clients may not allow you to view the mail header due to security or privacy concerns. Additionally, some email servers may not provide the mail header information due to configuration settings or security restrictions.