Sending HTML Emails with Embedded Images via Mailgun in Python

Struggling to embed inline images in HTML emails using Mailgun via Python. Revised snippet:

 def dispatch_email(recipient):
     sender = '[email protected]'
     content = render_markup('template.html', user=recipient.partition('@')[0])
     image_files = [open('asset1.png', 'rb'), open('asset2.png', 'rb')]
     response = post_mail(sender, recipient, 'Greetings', content, image_files)
     return response

Any suggestions?

hey, have a go at specifying unique content ids in your html and matching them in your headers. also, make sure you remeber to close your file handles properly. good luck!

I had a similar experience where embedding inline images in HTML emails required careful handling of content IDs. For me, it was essential to ensure that each image file was properly attached with the correct headers corresponding to the identifiers referenced in the HTML content. Using a context manager to open the files helped prevent lingering file handles and made the code more robust. Besides that, verifying that Mailgun received all parameters correctly was crucial, as slight mismatches in device formatting often led to images not displaying as expected.

Upon facing similar challenges, I discovered that the key is to streamline the way files are read and uploaded. I once encountered issues where the file handles were not properly managed, leading to intermittent failures. I resolved it by using a with block to ensure proper cleanup, which also clarified the source of the problem. I also made sure that my MIME structure matched the intended layout in the HTML content. Additionally, validating the complete payload before sending it to Mailgun helped me detect any misconfigurations early. This systematic approach improved the reliability of my email dispatch.