Possible UTF-8 Encoding Issue

[pvillars1]

We're using the proxy to connect a legacy CRM to Exchange Online. Recently, some incoming mail has been failing to get parsed by the CRM because, it appears, of an unanticipated UTF-8 BOM (byte order mark) as the first few bytes of the text stream. The problem has been incremental, starting with a few messages here and there, until now it is nearly all messages.

Is there a way to configure, or even hack, the proxy to not send the byte order mark?

[RedWings72]

I use email-oauth2-proxy to retrieve emails from hotmail accounts and I have a similar problem, initially it was only a few emails, but now all emails are malformed.