Special Characters in HTML
Having trouble with special characters?
Special characters may not always display correctly in different Email clients, as the content-type tags you might set in a <meta> tag are sometimes ignored and overridden by the content type in the header of an email.
If you have special characters that are not displaying properly, here is a converter took which will convert them into their HTML entitiy which you can then put directly into your signature.
Character converter tool
For more information, see this article: