HTML attachment preview: no Unicode support?

[Joe_Loth]

I am currently pairing Airtable w/sendgrid to send emails. I have pasted my HTML code into email and clicking HTML button. I can see the image in the preview email before I send it -the image is never delivered- it only sends as IMG_1936.PNG for example

[Bill_French]

Joe_Loth:

the image is never delivered- it only sends as IMG_1936.PNG for example

You need to describe how you are testing the message to see if the email is there. Some [email] clients specifically block HTML-embedded images. And some spam filters do this as well.