I've been having some problems with signatures on Outlook. I've made new ones for the company I work for but whenever anyone adds the sig to the message, this error appears:
When I click ok, the sig is ok apart from an odd square at the top as shown here:
Could anyone tell me what I've done wrong and how I could make these two problems go away? Thanks!

When I click ok, the sig is ok apart from an odd square at the top as shown here:

Could anyone tell me what I've done wrong and how I could make these two problems go away? Thanks!