How can I edit my user name when I send a email

How can I edit my user name when I send a email

Hello

I have a problem, when I sent an email, it says "Drector Comercial". I have already corrected it as Director Comercial in My profile account, but the changes are not shown still.

What can I do?

Best Regards

Octavio Parra
Director Comercial
La Primera Restaurante Bar
Santa Marta, Colombia