Some HTML formatted emails, but not all, are coming into Outlook as Plain Text. I say 'not all' to make the distinction that this is not the general setting that affects all incoming emails.
This problem is with the same sender every time. This sender CC's other users in the same office with Outlook, but they are not having this problem.
I've been reading over many, many messages in EE, but the answers are either to check the general setting that affects all emails, or there is something about AVG's pop3 scanning that causes it. This system does not use AVG.
When I open this email, which is not a forwarded email created by a 3rd party, I cannot change the formatting from Plain Text to HTML. Those options are grayed out.
What is causing this? How do I fix it?