I have an email template in Dynamics that renders on every email client except for Gmail on iOS. In that app, any two-column layouts show text in a single column 1 letter at a time.
I did some testing with the HTML for the template in parcel.io and when I sent from Parcel, the email rendered OK in Gmail. When sending from Dynamics though, the problem persisted.
The issue was fixed when these additional styles that get added on send were removed:
.tbContainer .columnContainer table{table-layout:fixed!important}
As a workaround, I added the following style to the email:
u .body .tbContainer .columnContainer table{table-layout:auto!important}
Then I added the body class to the <body> tag. The emails render fine now, but thought the Dynamics team should know.