Deletable email header

You're looking for a deletable email header!

In email headers, there are a few fields that can be used to indicate that an email is deletable or can be removed. Here are a few examples:

1. X-Priority: This header field can be set to 1 (high priority) or 5 (low priority). If the email is marked as 1, it may be considered more important and less likely to be deleted.
2. X-Delete: This header field can be set to true or 1 to indicate that the email should be deleted. Some email clients may respect this header and automatically delete the email.
3. X-Flag-Delete: This header field can be set to true or 1 to indicate that the email should be deleted. Some email clients may respect this header and automatically delete the email.
4. X-Label-Delete: This header field can be set to true or 1 to indicate that the email should be deleted. Some email clients may respect this header and automatically delete the email.

Here's an example of how you might set these headers using a programming language like Python:

import email

# Create a new email message
msg = email.MIMEText.MIMEText()

# Set the subject and body of the email
msg['Subject'] = 'Test email'
msg.set_payload('This is a test email.')

# Set the X-Priority header
msg['X-Priority'] = '1'

# Set the X-Delete header
msg['X-Delete'] = 'true'

# Set the X-Flag-Delete header
msg['X-Flag-Delete'] = 'true'

# Set the X-Label-Delete header
msg['X-Label-Delete'] = 'true'

# Send the email
server = smtplib.SMTP('smtp.example.com')
server.sendmail('[email protected]', '[email protected]', msg.as_string())
server.quit()

Keep in mind that not all email clients or servers may respect these headers, and it's always a good idea to test your email headers with different clients and servers to ensure they are being respected.