An user send to others an email containing a table wich has colors in it for easy reference.
Now the problem is that some users see the colors and some don't (see also attachment)!
"There are also a few issues with sending HTML formatting. Not all email programs may support formatted messages and text. You need to know if the recipient will receive your mail the way you send it. Some email reads like Pegasus simply don't read HTML; others (like Pocomail and even AOL) have difficulties displaying it properly. If the receiver's mail program does not support HTML, then this is how the message will be displayed:"