On my Courier server, one of my users keeps getting this message from a mailing list that she has signed up for:

------------------------------------------------------------ I received the following message for delivery to your address. This message contains several internal formatting errors. This is often caused by viruses that attempt to infect remote systems. Instead of blocking this message, it has been converted as a safe, text-only attachment that can be safely read with a text editor. This sometimes also happens when the sender's mail software has a bug that creates improperly-formatted messages. Although these kinds of formatting errors may often be ignored by other mail servers, this server detects and intercepts improperly-coded messages in order to prevent viruses from taking advantage of bugs in E-mail programs:

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She would like this email to arrive in the format it was intened because it makes it really hard to read. Is there any way to specify any sender's address that is excluded from this "safe message conversion", or is there any other solution I can use?

Thanks in advance for any suggestions!