This can happen if you're using Microsoft Outlook to forward bills into Access Capture by Lightyear. Outlook, by default, can send emails in a Rich Text Format, and this needs to be changed to Plain Text. Thankfully this is very straight forward.
When in Microsoft Outlook
On the Tools menu, click Options, and then click Mail Format.
In Compose in this message format, click to select Plain Text, and then click OK.
To send to certain recipients that use RTF format and others recipients that use plain text format, the sender must set the option for the recipient in either the Personal Address Book or the recipient's contact record.
If you're still having difficulty after changing this setting, check out this support article from Microsoft for more things to try.