Inbound Email - Formatting? (emails with HTLM code are ignored)
It's tricky to get html import right, both because the html we use in the web world and the one in emails is not quite the same (email html is stuck 10 years in the past)
... and because it's tricky to get it safe. being sure that an attacker doesn't use the email as a vector to inject javascript and other dangerous things is complex.

so going full html is probably not going to happen without significant investments, but you mentioned the issue of a single long line.

This one is probably easier to handle in a safe and satisfying way. Do you, or does someone in your team have some dev skills? it wouldn't be too hard to alter the display or the processing to inject  where they are new lines.