通过 python 发送时，电子邮件中的图像未显示在 iOS 上

Question

We are trying to set up an automated mailer using python. When it sends out the email, it displays images for our users on Gmail and other android mail clients, but does not seem to show the images for iOS' mail client.

We are unsure how to fix this. We have tried iframes, base 64, as well as sending images as attachments and it did not seem to work.

We are currently using smtplib and send MIME messages

message = MIMEMultipart("alternative")
...
part1 = MIMEText(text, "plain")
part2 = MIMEText(html, "html")
message.attach(part1)
message.attach(part2)
...
...

<a href="#"><img src="https://test.png" ></img></a><a href="#">
...

This is how it should look like:

This is what it looks like:

Answer 1

Alright, turns out Apple Mail doesn't support vh, so we just changed the image height and width to be formatted by pixels instead and it worked. Thanks for the help!