Images are broken in the emails sent

In the mails sent by the plugin containing the download links, any image within is broken. I have inspected the email and this is what I see:

<p><img alt="Chirpy Heat Signature" width="300" height="79">

<img alt="" width="214" height="300"></p>

As you can see, the src attribute is missing.

When I check PostMan logs, this is what I see

SOLUTION – Changing the Mailer type inside PostMan’s settings to PHPMailer resolved the issue.

I still posted this so if someone else has this issue, they can try what worked for me.