estimates are sending as plaintext and attachment, despite correct html settings

Hi there, Mitre. Let me guide you to the right support channel for assistance.
 

You’ll need to contact our Live Support team for further help. They have the tools and resources to identify the cause of estimates being sent as plain text or attachments.
 

Here’s how you can reach them:
 

1. Go to the Help icon.
2. In the Search tab, click Contact Us.
3. Enter a short description of your concern.
4. Click Continue.
5. Choose how you would like to connect with us.

Check their hours of operation to see when they’re available.
 

Let us know in the comments below if you have additional questions.