Mailgun uses a random pic while sending the email

[APratham]

Hi,
At the outset, thank you so much for making this. I was looking for a great way to send my template emails, and I stumbled upon the code you have written. Frankly, since this repository is pretty old, I wasn't expecting it to work and run into some form of dependency errors. But it's great that the code still works and should be perfect for my application.
There's just one problem though. Mailgun seems to be using a different profile pic every time I click on send email. Is there any chance we can add a profile pic of our choice while sending the email? That would be super helpful