Determining minimal content for password reset email template including {{ password_reset_url }}

[thxtech]

Issue Description

I'm trying to determine the minimal content required for the password_reset_key_message.txt template to successfully send a password reset email, specifically when including the {{ password_reset_url }} variable.

Observations:

1. A simple "test" as the email body successfully sends and is received:

   test
   

2. However, using only the {{ password_reset_url }} variable fails to deliver the email:

   {{ password_reset_url }}
   

3. The following content successfully sends the email and is received:

   You're receiving this email because you or someone else has requested a password reset for your user account.
   
   {{ password_reset_url }}
   

4. Interestingly, even minor changes (such as removing the word "account") prevented the email from being delivered.

Note: When I mention that the email "fails to send" or "is not sent", I mean that no error is apparent in the application, but the email is not received by the intended recipient.

Questions:

1. What is the minimum required content for the password reset email template when including the {{ password_reset_url }} variable?
2. Why does the template with only {{ password_reset_url }} fail to deliver the email?
3. Are there specific requirements or validations for email templates that include template variables?
4. Is there any documentation or guidelines regarding the required elements for this template?
5. Could there be any silent failures in the email sending process that are not reported as errors?

Any insights or explanations would be greatly appreciated, as I'm trying to customize the email content while keeping it as minimal as possible.

[thxtech]

I've found a solution to this issue and would like to close this discussion. The problem was resolved by using {% autoescape off %} in the template. Here's the minimal working template:

{% autoescape off %}
{{ password_reset_url }}
{% endautoescape %}

This allows the password_reset_url to be rendered correctly without HTML escaping, which was likely the cause of the email delivery failures. Thank you for your attention to this matter.